66221

Properties

Appears in sequences

• Numbers that are the sum of 12 positive 10th powers.at n=20A004812
• Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026648.at n=22A026658
• Number of hybrid 5-ary trees with n internal nodes.at n=5A239108
• Number A(n,k) of hybrid k-ary trees with n internal nodes; square array A(n,k), n>=0, k>=1, read by antidiagonals.at n=50A245049
• Let D(k) = {d(k,i)}, i = 1,2,...,q be the set of q divisors of an integer k. a(n) is the smallest number k such that there exist exactly n distinct integers M, 1 < M < k, where each set D(k) mod M is a multiplicative group.at n=42A379645
• Primes having only {1, 2, 6} as digits.at n=36A385774
• Prime numbersat n=6609