a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(2*k,k) * binomial(n*k,n-k).
A361835
a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(2*k,k) * binomial(n*k,n-k).
Terms
- a(0) =1a(1) =2a(2) =2a(3) =-10a(4) =-10a(5) =242a(6) =-678a(7) =-7054a(8) =88342a(9) =-207646a(10) =-6015904a(11) =88310862a(12) =-312514816a(13) =-8847633338a(14) =184252541514
External references
- oeis: A361835