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Search: id:A083508
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| A083508 |
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Number of distinct products ijk with 1 <= i< j <= k <= n. |
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+0
1
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| 0, 0, 2, 7, 16, 24, 40, 56, 77, 96, 137, 158, 214, 249, 284, 322, 418, 464, 583, 645, 708, 774, 946, 1007, 1125, 1220, 1330, 1420, 1685, 1768, 2069, 2203, 2346, 2492, 2658, 2750, 3166, 3362, 3553, 3675, 4183, 4344, 4909, 5129, 5327, 5575, 6252, 6432, 6849
(list; graph; listen)
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OFFSET
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1,3
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PROGRAM
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(PARI) for(n=1, 100, s=Set(); for(i=1, n-2, for(j=i+1, n-1, for(k=j, n, p=i*j*k; if(!setsearch(s, p), s=setunion(s, Set(p)))))); print1(length(s), ", ")) - Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 06 2006
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CROSSREFS
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Cf. A027430, A100435.
Sequence in context: A167236 A041573 A041341 this_sequence A048231 A070169 A162420
Adjacent sequences: A083505 A083506 A083507 this_sequence A083509 A083510 A083511
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Better definition and more terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 06 2006
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