a(n) = Sum_{k=0..n} binomial(n, k) * Sum_{j=k..n} n!/(k!*(j - k)!). Row sums of A377661.
A377662
a(n) = Sum_{k=0..n} binomial(n, k) * Sum_{j=k..n} n!/(k!*(j - k)!). Row sums of A377661.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =80a(4) =534a(5) =4102a(6) =35916a(7) =354888a(8) =3915750a(9) =47754938a(10) =637840356a(11) =9256590928a(12) =144977618044
External references
- oeis: A377662