50726
domain: N
Appears in sequences
- Hexagonal prism numbers: a(n) = (n + 1)*(3*n^2 + 3*n + 1).at n=25A005915
- Numbers k such that k | 12^k + 12.at n=36A015904
- a(n) = (1/n!)*A001565(n).at n=36A094792
- Number of words with n letters from an alphabet of size 26 with at least two equal consecutive letters.at n=3A106710
- Number of ways to place 7 nonattacking wazirs on a 7 X n board.at n=3A172234
- a(1)=0; thereafter a(2k)=k+a(k), a(2k+1)=k+a(6k+4).at n=53A271473
- Array read by antidiagonals: T(n,k) is the number of k element independent vertex sets in the n X k grid graph.at n=48A390159