0,2

Hankel transform of A002694(n+2).

Hankel transform of A002694(n+1) is sin(pi*n/2)*(cos(pi*n)/2-1/2).

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

Sequence in context: A155840 A056194 A110940 this_sequence A091648 A135707 A021923

Adjacent sequences: A141131 A141132 A141133 this_sequence A141135 A141136 A141137

easy,sign

Paul Barry (pbarry(AT)wit.ie), Jun 06 2008