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Search: id:A063483
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| 0, 0, 15, 64, 171, 252, 359, 656, 1079, 1346, 1656, 2415, 3373, 3927, 4550, 5993, 6793, 7690, 8653, 9697, 12028, 14695, 16158, 17731, 19398, 21174, 25017, 27108, 29318, 34077, 39324, 42128, 45071, 51398, 54716, 58239, 61877, 65685, 73758
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,1000
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PROGRAM
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(PARI) S(n)=sum(k=2, n, (k-1)*floor(n*(k-1)/k)); j=[]; for(n=0, 80, if(isprime(n), n+1, j=concat(j, S(n)))); j
(PARI) { n=-1; for (m=0, 10^9, if (!isprime(m), a=sum(k=2, m, (k - 1)*floor(m*(k - 1)/k)); write("b063483.txt", n++, " ", a); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 23 2009]
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CROSSREFS
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Cf. A002808, A055004.
Sequence in context: A119496 A044153 A044534 this_sequence A082825 A118861 A118531
Adjacent sequences: A063480 A063481 A063482 this_sequence A063484 A063485 A063486
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 28 2001
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