1,1

If b(n)=A015523, a(n)=5*b(n-1)+b(n+1); b(n) is Fibonacci-type, a(n) is Lucas-type.

a(n)=[(3+sqrt(29))/2 ]^n + [ (3-sqrt(29))/2 ]^n.

a(5)=5*b(4)+b(6): 1293=5*57+1008

Cf. A015523.

Sequence in context: A064056 A059599 A095662 this_sequence A090698 A027175 A093734

Adjacent sequences: A072260 A072261 A072262 this_sequence A072264 A072265 A072266

easy,nonn

M. Kristof (kristmikl(AT)freemail.hu), Jul 08 2002