69230

Appears in sequences

• Sum of all partitions of n into distinct parts.at n=43A066189
• G.f. satisfies: A(x) = A(x^2)^3 + x*A(x^2)^2.at n=39A195200
• Pentagonal numbers (A000326) in which parity of digits alternates.at n=25A297644
• a(n) = (A001359(n+1)^2 - 1)/24, where A001359 = lesser of twin primes; or: pentagonal numbers (A000326) whose indices are twin ranks (A002822).at n=42A308344
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^5.at n=26A341244