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A059367 From solution to x = tan x (next term is not an integer). 0
1, 2, 13, 146, 2343, 48984 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Suppose 1/y = 1/x + arctan(x). Then arctan(x) = Sum_{n>=0} a(n) * y^(2n+1)/(2n+1)!!. Note that a(6) = 6316012/5. a(7) = 38759594. - Michael Somos, Jan 01 2021

REFERENCES

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 171, #33.

LINKS

Table of n, a(n) for n=0..5.

CROSSREFS

Cf. A079330.

Sequence in context: A178248 A107699 A079330 * A309799 A324464 A204554

Adjacent sequences:  A059364 A059365 A059366 * A059368 A059369 A059370

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 28 2001

STATUS

approved

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Last modified June 12 22:40 EDT 2021. Contains 344975 sequences. (Running on oeis4.)