22548578304
domain: N
Appears in sequences
- Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (2,6)-perfect numbers.at n=9A019283
- Order of automorphism group of the group C_n X C_n X C_n (where C_n is the cyclic group of order n).at n=15A064767
- a(n) = smallest k such that tau(k)= n*tau(k-1) where tau(k) = number of divisors of k, or 0 if no such number exists.at n=30A086551
- G.f.: A(x) = Sum_{n>=0} (2*n+1) * 8^n * x^(n*(n+1)/2).at n=55A111983
- a(n) = 21*2^n.at n=30A175805
- a(n) = (2n+1)*8^n.at n=10A199301
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 145", based on the 5-celled von Neumann neighborhood.at n=34A279150