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Search: id:A130775
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| A130775 |
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a(1) = 0; for n > 1: a(n) = 2*(prime(n)-1)!/(prime(n)+1). |
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+0
1
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| 0, 1, 8, 180, 604800, 68428800, 2324754432000, 640237370572800, 93666727314800640000, 20325889640780924033433600000, 16578303738261941164769280000000
(list; graph; listen)
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OFFSET
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1,3
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MATHEMATICA
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Join[{0}, Table[2*(Prime[n] - 1)!/(Prime[n] + 1), {n, 2, 15}]] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jul 16 2007
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CROSSREFS
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Sequence in context: A089456 A108552 A060593 this_sequence A024286 A049034 A092546
Adjacent sequences: A130772 A130773 A130774 this_sequence A130776 A130777 A130778
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jul 14 2007
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EXTENSIONS
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More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 16 2007
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