a(n) = Sum_{k=0..n} binomial(2*k,k) * binomial(n*k,n-k).
A361829
a(n) = Sum_{k=0..n} binomial(2*k,k) * binomial(n*k,n-k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =62a(4) =486a(5) =4482a(6) =47106a(7) =553226a(8) =7152438a(9) =100644194a(10) =1527758136a(11) =24839853326a(12) =430045385424
External references
- oeis: A361829