A256159 Number of 2-polymatroids on n labeled points.

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

Offset: 0

Author

Max Alekseyev, Mar 16 2015

Keywords

• nonn
• more

Links

• 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.