A083063 a(n) = (n+1)^(n-1)/(n+2) + (-1)^n/(n+2).

1, 0, 1, 3, 21, 185, 2101, 29127, 478297, 9090909, 196495641, 4762874171, 128011456717, 3779594158353, 121637191772461, 4238682002231055, 159023502861656433, 6391554268241802725, 274019342889240109297

Offset: 0

Author

Paul Barry, Apr 20 2003

Keywords

• easy
• nonn

Crossrefs

Cf. A083062, A081216, A081209.

Programs

Sage

[abs(gaussian_binomial(n,1,-(n+2))) for n in range(-1,18)] # Zerinvary Lajos, May 31 2009