OFFSET
0,2
COMMENTS
Binomial transform of A093833.
LINKS
FORMULA
a(n)=4^n-3^n/3-0^n/3. a(n+1)=4^(n+1)-3^n, n>0.
a(0)=1, a(1)=3, a(2)=13, a(n)=7*a(n-1)-12*a(n-2) [From Harvey P. Dale, Dec 27 2011]
MATHEMATICA
CoefficientList[Series[(1-2x)^2/((1-3x)(1-4x)), {x, 0, 30}], x] (* or *) Join[{1}, LinearRecurrence[{7, -12}, {3, 13}, 30]] (* Harvey P. Dale, Dec 27 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 17 2004
STATUS
approved