A370095 - OEIS

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A370095

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

1

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