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A012662 sec(tanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+100/5!*x^5... 0
1, 0, 1, 6, 21, 100, 957, 8498, 70217, 762696, 9950809, 128378910, 1775380893, 28325140012, 483428842197, 8558590549322, 163465935697169, 3367220579004048, 72712394227734577, 1648059951297530166 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A151612 A344496 A012773 * A012418 A203295 A318566

Adjacent sequences: A012659 A012660 A012661 * A012663 A012664 A012665

KEYWORD

nonn

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified January 30 21:42 EST 2023. Contains 359947 sequences. (Running on oeis4.)