A174118 Partial sums of A000608.

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

Offset

1,2

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.

Links

Table of n, a(n) for n=1..17.

Crossrefs

Cf. A000608, A000112.

Sequence in context: A340911 A328409 A103593 * A368947 A378587 A006449

Adjacent sequences: A174115 A174116 A174117 * A174119 A174120 A174121

Keyword

hard,nonn

Author

Jonathan Vos Post, Mar 08 2010

Status

approved