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A081442 Expansion of cosh(x/sqrt(1-x^2)). +0
2
1, 1, 13, 421, 25369, 2449801, 346065061, 67243537453, 17192488230961, 5593309059948049, 2255588021494237501, 1103994926592923677621, 644587811150505183179593, 442516027690815793746696601 (list; graph; listen)
OFFSET

0,3

COMMENT

Periodic zeros suppressed.

CROSSREFS

Cf. A081439, A081440.

Sequence in context: A142484 A098890 A012023 this_sequence A100872 A012045 A012109

Adjacent sequences: A081439 A081440 A081441 this_sequence A081443 A081444 A081445

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 21 2003

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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