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A012970
sec(arctan(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+83/4!*x^4-460/5!*x^5...
0
1, 0, 4, -6, 83, -460, 5470, -53130, 722585, -9842040, 159135400, -2720898950, 51918624875, -1059369023700, 23452521576250, -553824975590250, 13985888446648625, -374715350908366000, 10638956635471235500
OFFSET
0,3
CROSSREFS
Sequence in context: A303211 A264374 A013127 * A196814 A213335 A101138
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved