References to A013515

sech(sec(x)-sech(x))=1-12/4!*x^4+1568/8!*x^8+6840768/12!*x^12...
1, 12, 1568, 6840768, 41485549312, 616649036623872

1 seqfan posts

Sat Dec 17 19:34:11 CET 2011    [seqfan] More about the errors in Patrick Demichel's sequences
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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