0,2

a(n+1)-4a(n)= period 2: repeat -2, 3.

a(n)=-1/6+(1/2)*(-1)^n+(2/3)*4^n, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jul 07 2008

Sequence in context: A160945 A079808 A089658 this_sequence A027247 A128241 A141190

Adjacent sequences: A140319 A140320 A140321 this_sequence A140323 A140324 A140325

nonn

Paul Curtz (bpcrtz(AT)free.fr), May 26 2008