OFFSET
0,2
COMMENTS
Binomial transform of A081669
FORMULA
Conjecture: n*(3*n^2-17*n+26)*a(n) +2*(-12*n^3+71*n^2-131*n+60)*a(n-1) +(57*n^3-347*n^2+710*n-480)*a(n-2) -6*(2*n-5)*(3*n^2-11*n+12)*a(n-3)=0. - R. J. Mathar, Nov 12 2012
EXAMPLE
a(6) = 1652; 3^6 - 1 + binomial(12,6) = 728 + 924 = 1652.
MAPLE
MATHEMATICA
Table[3^n - 1 + Binomial[2 n, n], {n, 0, 50}] (* Wesley Ivan Hurt, Nov 04 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Mar 28 2003
STATUS
approved