36905

Appears in sequences

• Number of free subsets of multiplicative group of GF(3^n).at n=9A007231
• Base-3 digits are, in order, the first n terms of the periodic sequence with initial period 1,2.at n=9A037480
• Numbers k such that phi(k) is equal to A008473(k-1).at n=9A039780
• Numbers that are repdigits in base 9.at n=37A048334
• Numbers whose base-9 representation is 555555555......5.at n=5A125962
• a(n) = A340131(A001006(n)).at n=8A340395
• Square array T(n,k) read by ascending antidiagonals: T(n,k) = (p - 1)/2*(2*(n - 1)*p^(n - 1) - (2*n - 3)*p^(n - 2)), n>=2, where p is the k-th odd prime.at n=18A391520