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Search: id:A012748
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A012748 sec(arctanh(x)*cos(x))=1+1/2!*x^2+1/4!*x^4+25/6!*x^6+3617/8!*x^8... +0
1
1, 1, 1, 25, 3617, 340145, 40490657, 7034559753, 1668333374913, 504856533178465, 189500285350524865, 86696156445549770233, 47524548345395009982689, 30739504895562596416971025 (list; graph; listen)
OFFSET

0,4
CROSSREFS

Sequence in context: A075414 A013737 A018861 this_sequence A036512 A053860 A091744

Adjacent sequences: A012745 A012746 A012747 this_sequence A012749 A012750 A012751

KEYWORD

nonn

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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