0,2

A. H. Beiler, Recreations in the Theory of Numbers, Dover, N.Y., 1964, pp. 194-196.

a(n)=(5^n/4)*[(3^(n+1))+(-1)^n].

a(n)=10a(n-1)+75a(n-2); a(0)=1.

Cf. A015518.

Sequence in context: A132676 A078516 A144516 this_sequence A049380 A057122 A113119

Adjacent sequences: A053534 A053535 A053536 this_sequence A053538 A053539 A053540

easy,nonn

Barry E. Williams, Jan 15 2000