OFFSET
3,1
COMMENTS
LINKS
Index entries for linear recurrences with constant coefficients, signature (6,-11,6).
FORMULA
Let M = {{1, 1, 1}, {2^n, 4, 2}, {3^n, 9, 3}}. Then a(n) = -Det[M]
a(n) = 6*(1-2^n)+2*3^n = 12*A000392(n).
MATHEMATICA
M = {{1, 1, 1}, {2^n, 4, 2}, {3^n, 9, 3}} a = Table[ -Det[M], {n, 3, 30}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, May 25 2006
EXTENSIONS
Edited by N. J. A. Sloane, Dec 13 2007
STATUS
approved