A177451 Partial sums of A054595.

1, 4, 26, 281, 3602, 56550, 1121538, 26193063, 693887458, 20808594004, 699641607622, 26001947464541, 1059148042622186, 47015706166302146, 2260884753582320442, 117153802097975691651, 6513779162975806691634

Offset: 3

Author

Jonathan Vos Post, May 09 2010

Keywords

• nonn

Comments

Partial sums of number of labeled 2-connected minimally 2-edge-connected graphs by nodes. The only prime in the partial sum values shown is 281.

Examples

			a(6) = 1 + 3 + 22 + 255 = 281 is prime.
		

Crossrefs

Cf. A054595, A054317, A001072, A054596.

Formula

a(n) = SUM[i=3..n] A054595(i).