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Search: id:A027425
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| A027425 |
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Number of distinct products ijk with 1 <= i,j,k <= n. |
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+0
9
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| 1, 4, 10, 16, 30, 40, 65, 80, 100, 120, 173, 194, 266, 301, 343, 378, 492, 536, 678, 732, 804, 876, 1075, 1130, 1247, 1343, 1450, 1537, 1833, 1909, 2248, 2362, 2515, 2668, 2850, 2940, 3400, 3587, 3789, 3919, 4477, 4624, 5242, 5440, 5654, 5916
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..200
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FORMULA
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a(n)=A027426(n)-1. - T. D. Noe, Jan 16 2007
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MAPLE
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f:=proc(n) local i, j, k, t1, t2; t1:={}; for i from 1 to n do for j from i to n do for k from j to n do t1:={op(t1), i*j*k}; od: od: od: t1:=convert(t1, list); nops(t1); end;
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CROSSREFS
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Adjacent sequences: A027422 A027423 A027424 this_sequence A027426 A027427 A027428
Sequence in context: A112984 A073121 A027430 this_sequence A024992 A069982 A009883
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KEYWORD
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nonn
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AUTHOR
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njas
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