A174514 Partial sums of A048995.

1, 5, 56, 143, 238, 357, 480, 625, 786, 973, 1178, 1387, 1602, 1839, 2084, 2331, 2592, 2859, 3134, 3421, 3710, 4001, 4304, 4609, 4930, 5253, 5578, 5913, 6254, 6625, 7030, 7437, 7862, 8291, 8738, 9209, 9682, 10179, 10694, 11211, 11730, 12259, 12798, 13349, 13904, 14465, 15040, 15623, 16234, 16857, 17482, 18109, 18766

Offset: 1

Author

Jonathan Vos Post, Nov 28 2010

Keywords

• nonn

Comments

The subsequence of values which are themselves in A048995 begins: 1, 625. The subsequence of primes begins 5, 4001, 8291, 9209.

Examples

			a(8) = 1 + 4 + 51 + 87 + 95 + 119 + 123 + 145 = 625 = 5^4.
		

Crossrefs

Cf. A048050, A048995.

Formula

a(n) = SUM[i=1..n] A048995(i) = SUM[i=1..n] (numbers that are not the sum of the nontrivial factors, excluding 1 and i, of some natural number).