

A158986


Coefficients of polynomials Q(n,x):=2+(1+Q(n1,x))^2, where Q(1,x)=x2.


4



1, 2, 1, 2, 1, 1, 4, 4, 0, 2, 1, 8, 24, 32, 14, 8, 8, 0, 1, 1, 16, 112, 448, 1116, 1744, 1552, 384, 700, 736, 160, 128, 64, 0, 0, 0, 2, 1, 32, 480, 4480, 29112, 139552, 509600, 1441024, 3166616, 5345344, 6668992, 5473536, 1494624
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OFFSET

1,2


COMMENTS

Let P(n,x) be the nth polynomial at A158984. Then Q(n,x)=P(n1,x)1 is a factor of P(n,x).


REFERENCES

Clark Kimberling, Polynomials defined by a secondorder recurrence, interlacing zeros, and Gray codes, The Fibonacci Quarterly 48 (2010) 209218.


LINKS

Table of n, a(n) for n=1..49.


EXAMPLE

Row 1: 1 2 (from x2)
Row 2: 1 2 1 (from x^22x1)
Row 3: 1 4 4 0 2
Row 4: 1 8 24 32 14 8 8 0 1


CROSSREFS

Cf. A158982, A158983, A158984, A158985.
Sequence in context: A024680 A083531 A003417 * A079900 A188317 A117354
Adjacent sequences: A158983 A158984 A158985 * A158987 A158988 A158989


KEYWORD

sign,tabf


AUTHOR

Clark Kimberling, Apr 02 2009


STATUS

approved



