A012970 sec(arctan(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+83/4!*x^4-460/5!*x^5...

1, 0, 4, -6, 83, -460, 5470, -53130, 722585, -9842040, 159135400, -2720898950, 51918624875, -1059369023700, 23452521576250, -553824975590250, 13985888446648625, -374715350908366000, 10638956635471235500

Offset

0,3

Links

Table of n, a(n) for n=0..18.

Crossrefs

Sequence in context: A303211 A264374 A013127 * A196814 A213335 A101138

Adjacent sequences: A012967 A012968 A012969 * A012971 A012972 A012973

Keyword

sign

Author

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

Status

approved