OFFSET
0,1
REFERENCES
Kees Doets and Jan van Eijck, The Haskell Road to Logic, Maths and Programming, The King's College Publications, London 2006. Cf. exercise 7.9, p 239.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..500
Index entries for linear recurrences with constant coefficients, signature (11, -18).
FORMULA
G.f.: 7*(4-9*x)/((1-2*x)*(1-9*x)). - Bruno Berselli, Jul 17 2011
MATHEMATICA
Table[3^(2n+3)+2^n, {n, 0, 20}] (* Harvey P. Dale, Apr 09 2011 *)
PROG
(Magma) [3^(2*n + 3) + 2^n: n in [0..20]]; // Vincenzo Librandi, Jul 17 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Apr 03 2011
STATUS
approved