1197504000
domain: N
Appears in sequences
- Number of Steiner triple systems (STS's) on 6n+1 or 6n+3 elements.at n=4A001201
- Number of Steiner triple systems (STS's) on n elements.at n=12A030128
- Number of adjacent pairs of form (odd,odd) among all permutations of {1,2,...,n}.at n=11A077611
- Number of adjacent pairs of form (even,even) among all permutations of {1,2,...,n}.at n=11A077612
- A coefficient tree from the list partition transform relating A000129, A000142, A000165, A110327, and A110330.at n=33A131980
- Table: T(n,k) = n!*binomial(n+1,2*k).at n=37A228955
- Catalan number analogs for totienomial coefficients (A238453).at n=19A245798
- a(n) = floor(n^2/4)*n!.at n=11A306258