26495
domain: N
Appears in sequences
- Composite numbers whose prime factors contain no digits other than 5 and 7.at n=31A036320
- The count of how many queens must be placed tentatively onto a board while seeking a first solution to the "N-Queens on an N x N chessboard" puzzle.at n=13A140450
- a(n) = number of components of the graph P(n,2) (defined in Comments).at n=21A145667
- a(n) = 46*n^2 - 1.at n=23A158634
- Numbers k such that Sum_{j=1..k} j^j == -1 (mod k).at n=13A188775
- Sum_{0<j<k<=n} s(k)-s(j), where s(j)=A002620(j) is the j-th quarter-square.at n=26A206806
- Antidiagonal sums of the convolution array A213841.at n=13A213843