0,2

a(n) = -1+1/2*(1/2+1/2*sqrt(5))^n+19/10*(1/2+1/2*sqrt(5))^n*sqrt(5)-19/10*sqrt(5)*(1/2 -1/2*sqrt(5))^n+1/2*(1/2-1/2*sqrt(5))^n, obtained using PURRS. - Alexander R. Povolotsky (pevnev(AT)juno.com), Apr 22 2008

Sequence in context: A041164 A041162 A041691 this_sequence A085949 A102238 A104646

Adjacent sequences: A022311 A022312 A022313 this_sequence A022315 A022316 A022317

nonn

njas