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Search: id:A093448
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| 1, 5, 32, 316, 4661, 94217, 2458810, 80128082, 3193424921, 153067911301, 8685693546692, 574691476630760, 43735137898763917, 3784250198022172001, 368841694500041857646, 40194470526005627873182
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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The row for n = 4 is
(1*2*3*4), (5*6*7), (8*9), 10 or
24 210 72 10.
hence a(4) = 24 +210 +72 +10 = 316.
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MAPLE
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A000217 := proc(n) n*(n+1)/2 ; end: A093447 := proc(n, k) factorial(k*n-A000217(k-1))/factorial((k-1)*n-A000217(k-2)) ; end: A093448 := proc(n) add( A093447(n, k), k=1..n) ; end: for n from 1 to 26 do printf("%d, ", A093448(n)) ; od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 27 2007
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CROSSREFS
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Cf. A093445, A093446, A093447.
Sequence in context: A104031 A023882 A109780 this_sequence A094653 A135250 A006926
Adjacent sequences: A093445 A093446 A093447 this_sequence A093449 A093450 A093451
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 02 2004
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 27 2007
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