31105
domain: N
Appears in sequences
- Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k).at n=20A096927
- Pierpont semiprimes: semiprimes of the form (2^K)*(3^L)+1.at n=36A113432
- a(n) = 24*n^2 + 1.at n=36A158547
- a(n) = 54*n^2 + 1.at n=24A158646
- a(n) = 4*6^n+1.at n=5A199319
- Number of integer partitions of n whose parts cannot be arranged into a (not necessarily square) matrix with equal row-sums and equal column-sums.at n=39A323348
- One half of the even Markoff nunbers.at n=7A388289