A128017 Expansion of (1+2x+x^2-x^3)/(1-x^2+x^4).

1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1, 1, 1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1, 1, 1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1, 1, 1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1, 1, 1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1, 1, 1, 2, 2, 1, 1, -1, -1, -2, -2, -1, -1

Offset: 0

Author

Paul Barry, Feb 11 2007

Keywords

• easy
• sign

Comments

Hankel transform of A128014, A128015, A005717(n+1).

Links

• Index entries for linear recurrences with constant coefficients, signature (0,1,0,-1).

Crossrefs

Cf. A128016.