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A370095

a(n) is the number of inequivalent binary delta-matroids on a ground set of size n.

5, 13, 40, 141 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`2,1`
	LINKS	`Table of n, a(n) for n=2..5.` `Daniel Yuschak, Delta-matroids with twist monomials, arXiv:2208.13258 [math.CO], 2022-2023.` `Daniel Yuschak, Delta-matroids whose twist polynomials are monomials, European Journal of Combinatorics 118, 103925 (2024).`
	FORMULA	`a(n) <= A006125(n+1).`
	CROSSREFS	`Cf. A006125, A370096.` `Sequence in context: A054856 A261057 A283456 * A337339 A337336 A121872` `Adjacent sequences: A370092 A370093 A370094 * A370096 A370097 A370098`
	KEYWORD	`nonn,more`
	AUTHOR	`Stefano Spezia, Feb 09 2024`
	STATUS	`approved`

Last modified August 6 07:30 EDT 2024. Contains 374960 sequences. (Running on oeis4.)