11453771776
domain: N
Appears in sequences
- Number of self-complementary 3-multigraphs on n nodes.at n=12A052107
- Number of step shifted (decimated) sequences using a maximum of four different symbols.at n=17A056373
- Consider a (solid) triangle with n cells on each edge, for a total of n(n+1)/2 cells; a(n) is number of inequivalent ways of labeling cells with 0's and 1's; triangle may be rotated and turned over.at n=7A061348