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A013558
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E.g.f. -log(sech(x)-log(x+1))= x+ 1/2!*x^2+4/3!*x^3+3/4!*x^4+33/5!*x^5...
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0
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1, 1, 4, 3, 33, 155, 1195, 5418, 72373, 496027, 6851051, 59706592, 986009607, 10430165629, 193892831665, 2439695949632, 50409517110169, 737532991565959, 16755308524034767, 279581740874221016
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| The inner function is sech(x)-log(1+x) = 1-x-x^3/3+11*x^4/24 -x^5/5 +59*x^6/720-x^7/7 +... = 1 -x/1! +0*x^2/2! -2*x^3/3! +11*x^4/4! -24*x^5/5! +59*x^6/6!...
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CROSSREFS
| Sequence in context: A064081 A099438 A002178 * A161000 A120078 A096201
Adjacent sequences: A013555 A013556 A013557 * A013559 A013560 A013561
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KEYWORD
| nonn
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AUTHOR
| Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
| Offset and another leading 1 from R. J. Mathar, Dec 22 2011
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