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-1, 7, 47, 223, 959, 3967, 16127, 65023, 261119, 1046527, 4190207, 16769023, 67092479, 268402687, 1073676287, 4294836223, 17179607039, 68718952447, 274876858367, 1099509530623, 4398042316799, 17592177655807
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..22.
Eric Weisstein's World of Mathematics, Carol Number
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FORMULA
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a(n)=(2^n-1)^2-2.
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MAPLE
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[seq (((stirling2(n, 2))^2-2), n=2..23)]; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 20 2006
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MATHEMATICA
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lst={}; Do[p=(2^n-1)^2-2; AppendTo[lst, p], {n, 66}]; lst [From Vladimir Joseph Stephan Orlovsky, Sep 27 2008]
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CROSSREFS
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Cf. A000225.
Sequence in context: A201437 A202509 A009202 * A091516 A064385 A009260
Adjacent sequences: A093109 A093110 A093111 * A093113 A093114 A093115
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KEYWORD
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sign
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AUTHOR
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Eric W. Weisstein, Mar 20, 2004
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STATUS
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approved
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