a(n) = a(n,m) = Sum_{k=0..n} binomial(m*k,k)*binomial(m*(n-k),n-k) for m=5.
A079678
a(n) = a(n,m) = Sum_{k=0..n} binomial(m*k,k)*binomial(m*(n-k),n-k) for m=5.
Terms
- a(0) =1a(1) =10a(2) =115a(3) =1360a(4) =16265a(5) =195660a(6) =2361925a(7) =28577440a(8) =346316645a(9) =4201744870a(10) =51023399190a(11) =620022989200
External references
- oeis: A079678