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Search: id:A012971
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A012971 sech(arctan(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+77/4!*x^4-340/5!*x^5... +0
1
1, 0, -4, 6, 77, -340, -3670, 34230, 303425, -5406840, -35315200, 1225800950, 4445446925, -374586782700, 9072379550, 147143429091750, -687446930233375, -71491380123358000, 767045215539726500 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Sequence in context: A012898 A013080 A013128 this_sequence A061216 A058163 A013127

Adjacent sequences: A012968 A012969 A012970 this_sequence A012972 A012973 A012974

KEYWORD

sign

AUTHOR

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

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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