A370096 - OEIS

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A370096

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

1

5, 16, 90, 2902

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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, A370095.

Sequence in context: A286072 A002830 A365654 * A196015 A332625 A307953

Adjacent sequences: A370093 A370094 A370095 * A370097 A370098 A370099

KEYWORD

nonn,more

AUTHOR

Stefano Spezia, Feb 09 2024

STATUS

approved