59140
domain: N
Appears in sequences
- Numbers k such that 237*2^k+1 is prime.at n=17A032495
- Sums of distinct powers of 9.at n=39A033046
- Positive numbers having the same set of digits in base 2 and base 9.at n=34A037414
- Sums of 4 distinct powers of 9.at n=5A038489
- Number T(n,k) of ways k L-tiles can be placed on an n X n square; triangle T(n,k), n>=0, 0<=k<=A229093(n), read by rows.at n=38A243608
- Numbers k such that k^2 + 1 divides 2^k + 1.at n=5A247220
- Expansion of Product_{k>=1} (1+x^k)^(k*(k-1)).at n=15A258344
- a(n) = Sum_{d|n} 9^(d-1).at n=5A339689