A192345 Constant term of the reduction of n-th polynomial at A161516 by x^2->x+1.

0, 1, 2, 17, 48, 245, 850, 3709, 14016, 57817, 225890, 912473, 3610800, 14470637, 57541426, 229912165, 915917568, 3655472497, 14572774850, 58135559777, 231822774960, 924665246117, 3687589909522, 14707675592461, 58656853828800, 233942936910025

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..26.

Formula

Empirical G.f.: x^2*(3*x^2+1)/(9*x^4+6*x^3-10*x^2-2*x+1). [Colin Barker, Nov 13 2012]

Example

(See A192344.)

Mathematica

(See A192344.)

Crossrefs

Cf. A192232, A192344.

Sequence in context: A141860 A105691 A360416 * A212836 A338564 A125609

Adjacent sequences: A192342 A192343 A192344 * A192346 A192347 A192348

Keyword

nonn

Author

Clark Kimberling, Jun 28 2011

Status

approved