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A117651
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A002415 and A052472 interlaced to give an increasing sequence for n>3.
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0
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1, 0, 2, 1, 0, 6, 10, 20, 35, 50, 84, 105, 168, 196, 300, 336, 495, 540, 770, 825, 1144, 1210, 1638, 1716, 2275, 2366, 3080, 3185, 4080, 4200, 5304, 5440, 6783, 6936, 8550, 8721, 10640, 10830, 13090, 13300, 15939, 16170, 19228, 19481, 23000, 23276, 27300
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Compare Magic numbers (A018226) 2, 8, 20, 28, 50, 82, 126, 168 to 6, 10, 20, 35, 50, 84, 105, 168
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FORMULA
| A052472[n]=n*(n + 1)*(n + 2)*(n - 3)/12 A002415[n]=n^2*(n^2 - 1)/12 a(n) = {A0542472[n],A002415[n]}
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MATHEMATICA
| f[n_] = n*(n + 1)*(n + 2)*(n - 3)/12 g[n_] = n^2*(n^2 - 1)/12 d = Flatten[Table[{Abs[f[n]], g[n]}, {n, 1, 25}]]
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CROSSREFS
| Cf. A002415, A052472, A018226.
Sequence in context: A129062 A163936 A187555 * A187196 A187197 A174869
Adjacent sequences: A117648 A117649 A117650 * A117652 A117653 A117654
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KEYWORD
| nonn,uned
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 11 2006
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