A062508 a(n) = 3^(2n)+7.

8, 16, 88, 736, 6568, 59056, 531448, 4782976, 43046728, 387420496, 3486784408, 31381059616, 282429536488, 2541865828336, 22876792454968, 205891132094656, 1853020188851848, 16677181699666576, 150094635296999128

Offset: 0

Author

Jason Earls, Jun 24 2001

Keywords

• easy
• nonn

References

• D. M. Burton, Elementary Number Theory, Allyn and Bacon, Inc. Boston, MA, 1976, pp. 29.

Links

• Harvey P. Dale, Table of n, a(n) for n = 0..1000
• Index entries for linear recurrences with constant coefficients, signature (10, -9).

Crossrefs

Cf. A047854.

Programs

Maple

A062508:=n->3^(2*n)+7: seq(A062508(n), n=0..30); # Wesley Ivan Hurt, Feb 11 2017

Mathematica

3^(2Range[0,20])+7 (* or *) LinearRecurrence[{10,-9},{8,16},20] (* Harvey P. Dale, May 13 2012 *)

Formula

a(0)=8, a(1)=16, a(n)=10*a(n-1)-9*a(n-2). - Harvey P. Dale, May 13 2012