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A192337 Coefficient of x in the reduction of n-th polynomial at A157751 by x^2->x+1. 1
0, 1, 3, 10, 31, 95, 286, 853, 2525, 7436, 21815, 63821, 186328, 543165, 1581591, 4601410, 13378731, 38880803, 112954430, 328063121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

For an introduction to reductions of polynomials by substitutions such as x^2->x+1, see A192232.

LINKS

Table of n, a(n) for n=1..20.

FORMULA

Empirical G.f.: -x^2*(x^2+x-1)/(x^4+6*x^3+x^2-4*x+1). [Colin Barker, Nov 13 2012]

MATHEMATICA

(See A192313.)

CROSSREFS

Cf. A192232, A192313.

Sequence in context: A033121 A180432 A237930 * A106517 A055217 A097472

Adjacent sequences:  A192334 A192335 A192336 * A192338 A192339 A192340

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jun 28 2011

STATUS

approved

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Last modified October 1 19:48 EDT 2022. Contains 357172 sequences. (Running on oeis4.)