33292288
domain: N
Appears in sequences
- a(n) = 8^(n-1)*(2^n - 1).at n=6A060195
- Stirling2 triangle with scaled diagonals (powers of 8).at n=29A075503
- Number of Pythagorean triples mod 2^n; i.e., number of solutions to x^2 + y^2 = z^2 mod 2^n.at n=12A091143
- a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 8.at n=15A160897
- Non-unitary amicable numbers.at n=39A259037
- Smaller of a non-unitary amicable pair.at n=20A259038
- Lesser member of Carmichael's variant of amicable pair: numbers k < m such that s(k) = m and s(m) = k, where s(k) = A371418(k).at n=18A371419