0,2

a(n)=2*a(n-1)+a(n-2)+8; a(0)=1, a(1)=10.

a(n)=[ {(9+5*sqrt(2))(1+sqrt(2))^n - (9-5*sqrt(2))(1-sqrt(2))^n}/2*sqrt(2) ]-4

Cf. A001333, A000129, A048694, A048695, A)48696.

Sequence in context: A068197 A079273 A048469 this_sequence A055850 A027979 A057456

Adjacent sequences: A048769 A048770 A048771 this_sequence A048773 A048774 A048775

easy,nice,nonn

Barry E. Williams