A370095 a(n) is the number of inequivalent binary delta-matroids on a ground set of size n.

5, 13, 40, 141

Offset: 2

Author

Stefano Spezia, Feb 09 2024

Keywords

• nonn
• more

Links

• 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).

Crossrefs

Cf. A006125, A370096.

Formula

a(n) <= A006125(n+1).