OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..500
Index entries for linear recurrences with constant coefficients, signature (28).
FORMULA
a(n) = 19*28^(n-1) for n > 0, a(0)=1.
a(n) = Sum_{k=0..n} A193722(n,k)*9^k.
MATHEMATICA
Join[{1}, 19*28^Range[0, 20]] (* Harvey P. Dale, Dec 06 2015 *)
PROG
(PARI) a(n)=if(n, 19*28^(n-1), 1) \\ M. F. Hasler, Oct 06 2011
(Magma) [1], [19*28^(n-1) : n in [1..15]]; // Vincenzo Librandi, Oct 06 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Oct 05 2011
STATUS
approved