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A256157 Number of 2-polymatroids on n unlabeled points. 3
1, 3, 10, 40, 228, 2380, 94495, 320863387 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
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 A256156.
Sequence in context: A009374 A297213 A216386 * A137781 A208125 A213108
KEYWORD
nonn,more
AUTHOR
Max Alekseyev, Mar 16 2015
STATUS
approved

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Last modified February 25 04:28 EST 2024. Contains 370309 sequences. (Running on oeis4.)