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A080740
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a(n) = number of m such that A080737(m) <= 2n.
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6
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2, 5, 9, 17, 24, 35, 48, 62, 82, 108, 138, 180, 223, 272, 336, 401, 483, 578, 685, 814, 957, 1113, 1299, 1502, 1737, 2004, 2299, 2633, 3005, 3420, 3886, 4400, 4981, 5618, 6325, 7108, 7967, 8927, 9982, 11134, 12415, 13805, 15327, 17006, 18830, 20841
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OFFSET
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0,1
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COMMENTS
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Total number of elements in first n rows of A080738.
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LINKS
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Table of n, a(n) for n=0..45.
J. Bamberg, G. Cairns and D. Kilminster, The crystallographic restriction, permutations and Goldbach's conjecture, Amer. Math. Monthly, 110 (March 2003), 202-209.
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PROG
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(Haskell)
a080740 n k = a080740_list !! n
a080740_list = scanl1 (+) a080739_list -- Reinhard Zumkeller, Jun 13 2012
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CROSSREFS
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Partial sums of A080739.
Sequence in context: A119676 A348836 A036711 * A123324 A167887 A023603
Adjacent sequences: A080737 A080738 A080739 * A080741 A080742 A080743
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane, Mar 08 2003
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EXTENSIONS
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More terms from Devin Kilminster (devin(AT)maths.uwa.edu.au), Mar 10 2003
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STATUS
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approved
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