Update, October 18, 2026: The published portfolio now contains 17 sequences (11 authored and six extended), including A397641 and A397657. One new sequence and two updates were proposed on October 17. The A397075 formula update was approved October 18; A397074 and A401195 remain under review. See the current portfolio for their scope and submission records. The title and count below describe the July snapshot; the method and reproduction descriptions have been clarified.
Over the past few months I have had fifteen integer sequences published in the On-Line Encyclopedia of Integer Sequences: nine new sequences I authored, and six classical sequences I extended with new terms.
They have almost nothing in common by subject. They range over Ramsey theory, extremal graph theory, knot theory, algebraic graph theory, additive combinatorics, Boolean function complexity, and combinatorial game theory. What they share is a computational approach: SAT solving and exact enumeration, with proofs where available. Some contributions extend a published frontier; others organize existing mathematical counts into new entries. Prior work and the scope of each computation belong with the individual contribution. The spread across fields is deliberate.
The method also has a direction. The computed values are where I go looking for structure. One of them, the distinct-variable Rado numbers for x + y = nz (A394445), began as a column of computed integers and ended as a proved theorem with a closed form and a 500-term b-file. The rest are trailheads: some already followed, others left marked for whoever arrives next.
The full portfolio, with a table of every sequence, its domain, and the OEIS editors who reviewed it, is at /research/oeis-contributions/. The portfolio repository collects the index, data, and reproduction scripts. Their scopes differ: a fresh enumeration, a recalculation on a stored census, and a solver check do not establish the same things. The current portfolio explains those limits and distinguishes published work from pending submissions and local artifacts.
The OEIS has been a shared ledger of integer sequences since 1964. Adding a term is a small, permanent contribution to a commons: a number that was unknown is now known, checked, and citable by anyone who needs it.
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