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A013001
cos(arctan(x)+tan(x))=1-4/2!*x^2+16/4!*x^4-544/6!*x^6+25344/8!*x^8...
0
1, -4, 16, -544, 25344, -1920384, 246359040, -39508168704, 9120978370560, -2587275558617088, 939278027083448320, -411971792033339539456, 217927272725489369743360, -135949730585003375068184576
OFFSET
0,2
CROSSREFS
Sequence in context: A013138 A262546 A013006 * A373739 A218644 A013179
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved