0,2

a(n)=(-1)^C(n+1,2)*(F(n-1)+F(n+1))(5/6-cos(pi*n/3)/3)(1+(-1)^n)/2+(F(n)+F(n+2))(5/6-cos(pi*(n+1)/3)/3)(1-(-1)^n)/2;

Cf. A128052.

Adjacent sequences: A128050 A128051 A128052 this_sequence A128054 A128055 A128056

Sequence in context: A092474 A107470 A071042 this_sequence A063212 A088147 A109579

easy,sign

Paul Barry (pbarry(AT)wit.ie), Feb 13 2007