0,2

a(n)=2^A128054(n)*A128053(n). Hankel transform of A128058.

a(n)=A128055(n)*((cos(pi*n/2)-sin(pi*n/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));

Sequence in context: A076711 A075088 A102428 this_sequence A068808 A068133 A024497

Adjacent sequences: A128053 A128054 A128055 this_sequence A128057 A128058 A128059

easy,sign

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