21367
domain: N
Appears in sequences
- Number of 2-factors in D_4 X P_n.at n=7A003758
- Number of 0's in the binary expansion of A127962(n).at n=29A127964
- First differences of A132581.at n=46A132582
- Number of lower triangles of a 4 X 4 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less.at n=9A195234
- Number of partitions of n where the difference between consecutive parts is at most 2.at n=49A224956
- p-INVERT of (1,2,2,2,2,2,2,...) (A040000), where p(S) = (1 - S)^2.at n=9A292400
- Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A299596
- Number of n X 5 0..1 arrays with every element equal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=4A299599
- T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=40A299602
- Numbers k such that 387*2^k+1 is prime.at n=22A323038
- Number of double palindrome structures of length n using exactly two different symbols.at n=20A328688