A118439 Column 0 of triangle A118438.

1, -1, 5, 11, -23, -41, 45, -29, 337, 1199, -3115, -6469, 10297, 8839, 16125, 108691, -354143, -873121, 1721765, 2521451, -1476983, 6699319, -34182195, -103232189, 242017777, 451910159, -597551755, -130656229, -2465133863, -10513816601, 29729597085, 66349305331, -116749235903

Offset: 0

Author

Paul D. Hanna, Apr 28 2006

Keywords

• sign

Links

• Index entries for linear recurrences with constant coefficients, signature (0, -5, 0, -19, 0, 25).

Crossrefs

Cf. A118438 (triangle), A118440 (row sums); A118436 (column 0 of inverse).

Programs

Mathematica

LinearRecurrence[{0, -5, 0, -19, 0, 25}, {1, -1, 5, 11, -23, -41}, 33] (* Jean-François Alcover, Apr 08 2024 *)

PARI

{a(n)=polcoeff((1-x+10*x^2+6*x^3+21*x^4-5*x^5)/(1-x^2)/(1+6*x^2+25*x^4+x*O(x^n)),n)}

Formula

G.f.: (1-x+10*x^2+6*x^3+21*x^4-5*x^5)/(1-x^2)/(1+6*x^2+25*x^4).