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A144830 Numerators of the convergents to x = 1/(x^4+1). 0
1, 1, 16, 83521, 493639046268679584001 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

These numbers are quartics. The recursion provides a method of solving the

quintic x^5 + x - 1. In general, extending this notion, we can use the

recursion x = 1/(x^(n-1)+1) to find a solution for n-th degree equations of

the form x^n+x-1=0.

PROG

(PARI) x=0; for(j=1, 7, x=1/(x^4+1); print1((numerator(x))", "))

CROSSREFS

Sequence in context: A078186 A087926 A193135 * A051675 A175988 A013804

Adjacent sequences:  A144827 A144828 A144829 * A144831 A144832 A144833

KEYWORD

frac,nonn

AUTHOR

Cino Hilliard (hillcino368(AT)hotmail.com), Sep 21 2008

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Last modified February 17 12:38 EST 2012. Contains 206021 sequences.