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URL: https://oeis.org/A013502

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A013502
exp(sec(x)-cosh(x))=1+4/4!*x^4+60/6!*x^6+1944/8!*x^8+100920/10!*x^10...
0
1, 0, 4, 60, 1944, 100920, 7475884, 751912980, 98422975824, 16234482600240, 3291096841607764, 803683798982126700, 232547478441133195704, 78638339747954023956360, 30716698087655852509331644
OFFSET
0,3
CROSSREFS
Sequence in context: A336637 A330069 A211309 * A303286 A322450 A099705
KEYWORD
nonn
EXTENSIONS
Checked by N. J. A. Sloane, Dec 17 2011
STATUS
approved