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A099932 Triangle read by rows: nonzero coefficients of polynomials 2^n*E(n,x), with E the Euler polynomials. 1
1, 2, -1, 4, -4, 8, -12, 2, 16, -32, 16, 32, -80, 80, -16, 64, -192, 320, -192, 128, -448, 1120, -1344, 272, 256, -1024, 3584, -7168, 4352, 512, -2304, 10752, -32256, 39168, -7936, 1024, -5120, 30720, -129024, 261120, -158720, 2048, -11264 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..42.

EXAMPLE

1,

2*x - 1,

4*x^2 - 4*x,

8*x^3 - 12*x^2 + 2,

16*x^4 - 32*x^3 + 16*x,

32*x^5 - 80*x^4 + 80*x^2 - 16,

64*x^6 - 192*x^5 + 320*x^3 - 192*x

CROSSREFS

With zeros: A004174/A004175.

Row sums and constant terms are (-1)^n*A009006.

Sequence in context: A300622 A195691 A074763 * A175000 A355020 A008346

Adjacent sequences:  A099929 A099930 A099931 * A099933 A099934 A099935

KEYWORD

sign,tabf

AUTHOR

Ralf Stephan, Nov 06 2004

STATUS

approved

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Last modified August 11 07:36 EDT 2022. Contains 356055 sequences. (Running on oeis4.)