A180624 Partials sums of A090615.

1264460, 3379784, 6164364, 11102500, 18271604, 36320580, 54976960, 83135125, 129857825, 210986457, 385264277, 594788487, 924792067, 1423007483, 2659409715, 4458691045, 6846467595, 9563962830, 12443660134, 16149431959

Offset: 1

Author

Jonathan Vos Post, Sep 13 2010

Keywords

• nonn
• less

Comments

Partials sums of smallest member of sociable quadruples. Primes in this partial sum begin: 924792067, 16149431959.

Examples

			a(13) = 1264460 + 2115324 + 2784580 + 4938136 + 7169104 + 18048976 + 18656380 + 28158165 + 46722700 + 81128632 + 174277820 + 209524210 + 330003580 = 924792067 is prime.
		

Links

• Eric W. Weisstein, Sociable Numbers

Crossrefs

Cf. A090615.

Formula

a(n) = sum[i=1..n] A090615(i).