69810262081
domain: N
Appears in sequences
- Sum of n-th powers of divisors of 64.at n=6A020516
- Base 8 digits are, in order, the first n terms of the periodic sequence with initial period 1,0.at n=12A033118
- Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=18A033140
- Duplicate of A020516.at n=6A034670
- a(n) = (64^n - 1)/63.at n=7A133853
- Numerator of Product_{d|n} b(d)^Moebius(n/d), where b() = A100371().at n=48A226305
- a(n) is the number of relations from an n-element set into a set of at most n elements.at n=6A344260
- Triangle read by rows: T(n, k) = Sum_{d=0..n-k} binomial(n, d)*StirlingS2(n-d, k)*63^(n-d-k), with 0 <= k <= n.at n=29A364072