34905
domain: N
Appears in sequences
- Numbers k such that sigma(k) = sigma(k+13).at n=11A015883
- Riordan array (1/(1-x-x^2), x(1+x)/(1-x-x^2)^2).at n=59A112973
- Number of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 5 X 5 X 5 subtriangle.at n=8A153564
- Numbers k such that k^2 | A038199(k).at n=41A317475