91756
domain: N
Appears in sequences
- Numbers k such that A003313(k) = A003313(5*k).at n=28A116460
- Numbers k such that k^2 divides 15^k-1.at n=34A128395
- Number of n X 5 binary arrays without the pattern 0 1 diagonally or vertically.at n=18A188839
- Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4.at n=9A197313
- 27-gonal pyramidal numbers: a(n) = n*(n+1)*(25*n-22)/6.at n=28A256647