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Search: id:A061743
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| A061743 |
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n! is divisible by (n+1)^2. |
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+0
2
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| 11, 14, 15, 17, 19, 20, 23, 24, 26, 27, 29, 31, 32, 34, 35, 38, 39, 41, 43, 44, 47, 48, 49, 50, 51, 53, 54, 55, 56, 59, 62, 63, 64, 65, 67, 68, 69, 71, 74, 75, 76, 77, 79, 80, 83, 84, 86, 87, 89, 90, 91, 92, 94, 95, 97, 98, 99, 101, 103, 104, 107, 109, 110, 111, 113, 114
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,2000
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MATHEMATICA
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Select[Range[120], IntegerQ[ #!/(# + 1)^2] &]
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PROGRAM
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(PARI) { n=0; f=1; for (a=1, 2588, f*=a; if (f%(a + 1)^2 == 0, write("b061743.txt", n++, " ", a)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 27 2009]
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CROSSREFS
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Cf. A060462.
Sequence in context: A132991 A005788 A091403 this_sequence A038630 A025058 A153049
Adjacent sequences: A061740 A061741 A061742 this_sequence A061744 A061745 A061746
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 21 2001
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