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Search: id:A120793
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| A120793 |
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Denominators of partial sums of Catalan numbers scaled by powers of -1/12. |
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+0
5
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| 1, 12, 72, 1728, 10368, 4608, 248832, 11943936, 214990848, 2579890176, 15479341056, 371504185344, 2229025112064, 26748301344768, 53496602689536, 1711891286065152, 10271347716390912, 369768517790072832
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OFFSET
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0,2
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COMMENT
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Numerators are given under A120792.
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FORMULA
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a(n)=denominator(r(n)), with the rationals r(n):=sum(((-1)^k)*C(k)/12^k,k=0..n) with C(k):=A000108(k) (Catalan numbers). Rationals r(n) are taken in lowest terms.
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CROSSREFS
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Sequence in context: A138402 A108734 A143559 this_sequence A120783 A103475 A024014
Adjacent sequences: A120790 A120791 A120792 this_sequence A120794 A120795 A120796
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KEYWORD
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nonn,easy,frac
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jul 20 2006
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