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 A180624 Partials sums of A090615. 0
 1264460, 3379784, 6164364, 11102500, 18271604, 36320580, 54976960, 83135125, 129857825, 210986457, 385264277, 594788487, 924792067, 1423007483, 2659409715, 4458691045, 6846467595, 9563962830, 12443660134, 16149431959 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Partials sums of smallest member of sociable quadruples. Primes in this partial sum begin: 924792067, 16149431959. LINKS Eric W. Weisstein, Sociable Numbers FORMULA a(n) = sum[i=1..n] A090615(i). EXAMPLE a(13) = 1264460 + 2115324 + 2784580 + 4938136 + 7169104 + 18048976 + 18656380 + 28158165 + 46722700 + 81128632 + 174277820 + 209524210 + 330003580 = 924792067 is prime. CROSSREFS Cf. A090615. Sequence in context: A072892 A090615 A222975 * A081430 A254026 A254019 Adjacent sequences:  A180621 A180622 A180623 * A180625 A180626 A180627 KEYWORD nonn,less AUTHOR Jonathan Vos Post, Sep 13 2010 STATUS approved

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Last modified May 10 03:11 EDT 2021. Contains 343747 sequences. (Running on oeis4.)