200277

Appears in sequences

• a(0)=1, a(n+1) = 5*a(n)-4*A117641(n) for n>=0.at n=9A126952
• Riordan array (f(x), x*g(x)), f(x) is the g.f. of A126952, g(x) is the g.f. of A117641.at n=45A171243