1,1

Richard Choulet, Curtz-like transformation.

The o.g.f is the function f given by f(z)=a(0)+a(1)*z+...=((2-2*z+z^2+z^3)/((1+z)*(1-3*z+2*z^2-z^3))). Recurrence formula : a(n+4)=2*a(n+3)+a(n+2)-a(n+1)+a(n)

Cf. A136302, A136303, A136304, A136305.

Sequence in context: A061274 A061575 A133602 this_sequence A051769 A049955 A156464

Adjacent sequences: A137246 A137247 A137248 this_sequence A137250 A137251 A137252

easy,nonn

Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 05 2008