38131
domain: N
Appears in sequences
- a(n) = 6561*n^2 - 7732*n + 2278.at n=2A157376
- Numbers k such that k^p-p is prime, where p is product of the digits of k.at n=28A178328
- Number of equivalence classes of ballot paths of length n for the string dud.at n=26A274113
- Number of lattice paths from (0,0) to (n,n) using steps (i,j) with i,j>=0 and gcd(i,j)=1.at n=6A368639
- Centered pentagonal numbers which are squarefree semiprimes.at n=44A381043
- Centered pentagonal numbers which are semiprimes.at n=45A382132