a(1) = 1; a(n) = 3 + n * Sum_{k=1..n-1} a(k).
A082428
a(1) = 1; a(n) = 3 + n * Sum_{k=1..n-1} a(k).
Terms
- a(0) =1a(1) =5a(2) =21a(3) =111a(4) =693a(5) =4989a(6) =40743a(7) =372507a(8) =3771633a(9) =41907033a(10) =507075099a(11) =6638074023a(12) =93486209157
External references
- oeis: A082428