a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k)^2 * a(k-1).
A342196
a(0) = 1; a(n) = Sum_{k=1..n} binomial(n,k)^2 * a(k-1).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =23a(4) =155a(5) =1355a(6) =14371a(7) =183911a(8) =2781283a(9) =48726355a(10) =976903875a(11) =22183097191a(12) =565060532965
External references
- oeis: A342196