A078047 Expansion of (1-x)/(1+x+x^2+2*x^3).

1, -2, 1, -1, 4, -5, 3, -6, 13, -13, 12, -25, 39, -38, 49, -89, 116, -125, 187, -294, 357, -437, 668, -945, 1151, -1542, 2281, -3041, 3844, -5365, 7603, -9926, 13053, -18333, 25132, -32905, 44439, -61798, 83169, -110249, 150676, -206765, 276587, -371174, 508117, -690117, 924348, -1250465

Offset

0,2

Links

Table of n, a(n) for n=0..47.

Index entries for linear recurrences with constant coefficients, signature (-1,-1,-2).

Prog

(PARI) Vec((1-x)/(1+x+x^2+2*x^3) + O(x^50)) \\ Jinyuan Wang, Apr 07 2020

Crossrefs

First differences of A077976.

Sequence in context: A203300 A134172 A208061 * A329689 A270952 A143392

Adjacent sequences: A078044 A078045 A078046 * A078048 A078049 A078050

Keyword

sign,easy

Author

N. J. A. Sloane, Nov 17 2002

Status

approved