G.f. D(x) satisfies: D(x) = (1 - x*D(x))*(1 - 2*x*D(x))*(1 - 3*x*D(x)) / (1 - 4*x*D(x))^3.
A341967
G.f. D(x) satisfies: D(x) = (1 - x*D(x))*(1 - 2*x*D(x))*(1 - 3*x*D(x)) / (1 - 4*x*D(x))^3.
Terms
- a(0) =1a(1) =6a(2) =71a(3) =1036a(4) =16850a(5) =292974a(6) =5330003a(7) =100198252a(8) =1930974350a(9) =37944361084a(10) =757400034534
External references
- oeis: A341967