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A093112 Carol numbers. 1
-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)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

Eric Weisstein's World of Mathematics, Carol Number

FORMULA

a(n)=(2^n-1)^2-2.

MAPLE

[seq (((stirling2(n, 2))^2-2), n=2..23)]; - Zerinvary Lajos, Dec 20 2006

MATHEMATICA

lst={}; Do[p=(2^n-1)^2-2; AppendTo[lst, p], {n, 66}]; lst [From Vladimir Joseph Stephan Orlovsky, Sep 27 2008]

CROSSREFS

Cf. A000225.

Sequence in context: A201437 A202509 A009202 * A091516 A064385 A009260

Adjacent sequences:  A093109 A093110 A093111 * A093113 A093114 A093115

KEYWORD

sign

AUTHOR

Eric W. Weisstein, Mar 20, 2004

STATUS

approved

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Last modified April 16 14:51 EDT 2014. Contains 240600 sequences.