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Search: id:A080668
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| A080668 |
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Numbers of the form n!+n^3. |
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+0
1
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| 2, 10, 33, 88, 245, 936, 5383, 40832, 363609, 3629800, 39918131, 479003328, 6227022997, 87178293944, 1307674371375, 20922789892096, 355687428100913, 6402373705733832, 121645100408838859, 2432902008176648000
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Sum of the reciprocals = 0.6470299890164780452999873886..
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PROGRAM
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(PARI) factncub(n) = {sr=0; for(x=1, n, y=x!+x^3; print1(y", "); sr+=1.0/y; ); print(); print(sr) }
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CROSSREFS
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Sequence in context: A032095 A151019 A004028 this_sequence A062453 A036369 A043004
Adjacent sequences: A080665 A080666 A080667 this_sequence A080669 A080670 A080671
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Mar 02 2003
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