1,3

Partial sums of number of planar graphs with minimum degree at least 1 and n nodes. The subsequence of primes in this partial sum begins: 3, 821.

a(n) = Sum_{i=1..n} A049369(i).

a(11) = 0 + 1 + 2 + 7 + 22 + 109 + 680 + 6144 + 72887 + 1061063 + 17540092 = 18681007.

Cf. A049369, A005470.

Sequence in context: A134952 A184436 A149028 * A126183 A174798 A042039

Adjacent sequences: A174570 A174571 A174572 * A174574 A174575 A174576

Jonathan Vos Post, Mar 22 2010

approved