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Search: id:A127943
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A127943 a(n)=2^C(n+1,2)/A046161(n). +0
2
1, 1, 1, 4, 8, 128, 2048, 131072, 2097152, 536870912, 137438953472, 140737488355328, 72057594037927936, 295147905179352825856, 1208925819614629174706176, 19807040628566084398385987584 (list; graph; listen)
OFFSET

0,4

FORMULA

a(n)=2^C(n+1,2)/denominator(C(2n,n)/4^n); a(n)=2^A127944(n);

CROSSREFS

Sequence in context: A012940 A013049 A060239 this_sequence A012498 A133262 A120822

Adjacent sequences: A127940 A127941 A127942 this_sequence A127944 A127945 A127946

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Feb 08 2007

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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