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A128275 Absolute values of numerators of series expansion of sinh(x)/sqrt((cosh(x))^2+(sinh(x))^2) about 0. 0
1, 5, 121, 1369, 698161, 22394737, 25947503401, 29819441791, 3389281372287841, 354891998735343073 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

MATHEMATICA

Series[Sinh[x]/(Sqrt[Cosh[x]^2 + Sinh[x]^2]), {x, 0, 20}]

CROSSREFS

Cf. A012085, A012193, A128274.

Sequence in context: A172806 A054752 A258978 * A028448 A108791 A282271

Adjacent sequences:  A128272 A128273 A128274 * A128276 A128277 A128278

KEYWORD

nonn

AUTHOR

Artur Jasinski, Feb 22 2007

STATUS

approved

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Last modified March 23 18:13 EDT 2019. Contains 321433 sequences. (Running on oeis4.)