0,2

a(n)=2*a(n-1)+a(n-2)+5; a(0)=1, a(1)=6.

a(n)=[ {(6+(7/2)*sqrt(2))(1+sqrt(2))^n - (6-(7/2)*sqrt(2))(1-sqrt(2))^n}/ 2*sqrt(2) ]-5/2.

Cf. A048693, A048654, A048655.

Sequence in context: A100206 A007044 A047862 this_sequence A055267 A009370 A009372

Adjacent sequences: A048752 A048753 A048754 this_sequence A048756 A048757 A048758

easy,nonn

Barry E. Williams