148864

Appears in sequences

• a(n)=3a(n-1)+C(n+4,4),n>0, a(0)=1.at n=9A097787
• a(n) = [x^n] ( c(x)/c(-x) )^n, where c(x) = (1 - sqrt( 1 - 4*x))/(2*x) is the o.g.f. of the Catalan numbers A000108.at n=6A333564