a(n) = Sum_{k=0..n} binomial(n,k)*3^k*(k+1)^(n-k).
A196795
a(n) = Sum_{k=0..n} binomial(n,k)*3^k*(k+1)^(n-k).
Terms
- a(0) =1a(1) =4a(2) =22a(3) =145a(4) =1096a(5) =9259a(6) =85924a(7) =865183a(8) =9364864a(9) =108173827a(10) =1325589676a(11) =17149360111a(12) =233271228880
External references
- oeis: A196795