50954

Appears in sequences

• Number of partitions into non-integral powers.at n=26A000339
• Sum of next n even interprimes.at n=20A075675
• Beach-Williams Pell numbers of type 2pq (p,q primes).at n=16A212075
• G.f.: Product_{k>=1} (1 + 3*x^(k^2)) / (1-x^k).at n=29A280225
• Numbers k such that s(k) = s(k+1) but phi(k) != phi(k+1), where s(k) = phi(k) + phi(phi(k)) + ... + 1 is the sum of iterated phi (A092693).at n=20A291177
• Triangle read by rows: T(n,k) is the number of achiral combinatorial maps with n edges and k vertices, 1 <= k <= n + 1.at n=50A380617