A178532 Partial sums of problimes (third definition, A003068).

2, 6, 13, 24, 39, 58, 81, 109, 142, 180, 223, 271, 324, 382, 445, 513, 586, 665, 750, 841, 938, 1041, 1150, 1265, 1386, 1513, 1646, 1785, 1930, 2081, 2238, 2401, 2570, 2745, 2926, 3113, 3306, 3505, 3710, 3921, 4138, 4362, 4593, 4831, 5076

Offset: 1

Author

Jonathan Vos Post, Dec 28 2010

Keywords

• nonn
• easy

Comments

The subsequence of prime partial sums of problimes begins: 2, 13, 109, 223, 271, 2081, 4831, 8233.

The subsequence of problime partial sums of problimes begins: 2, 58, 109.

Examples

			a(12) = 2 + 4 + 7 + 11 + 15 + 19 + 23 + 28 + 33 + 38 + 43 + 48 = 271 is prime.
		

Crossrefs

Cf. A003068, A007504, A013918.

Formula

SUM[i=1..n] A003068(i).