A256159 Number of 2-polymatroids on n labeled points.

1, 3, 14, 115, 2040, 109707, 39445994, 1560089623047

Offset

0,2

Links

Table of n, a(n) for n=0..7.

Thomas J. Savitsky, Enumeration of 2-polymatroids on up to seven elements. SIAM J. Discrete Math., 28(4):1641-1650, 2014. arXiv:1401.8006

Crossrefs

Row sums of A256158.

Cf. A256156, A256157, A058673.

Sequence in context: A333797 A229113 A180435 * A122081 A007140 A161936

Adjacent sequences: A256156 A256157 A256158 * A256160 A256161 A256162

Keyword

nonn,more

Author

Max Alekseyev, Mar 16 2015

Status

approved