A174118 Partial sums of A000608.

1, 2, 3, 6, 16, 60, 298, 1948, 16460, 179801, 2540520, 46485494, 1101504593, 33766488831, 1336910042036, 68237302714204, 4481677081035893

Offset: 1

Author

Jonathan Vos Post, Mar 08 2010

Keywords

• hard
• nonn

Comments

Partial sums of number of connected partially ordered sets with n unlabeled elements. The subsequence of primes in this partial sum begins: 2, 3, 179801. Partial sum of Inverse Euler transform of A000112.

Crossrefs

Cf. A000608, A000112.