Main diagonal of triangle A303920: a(n) = A303920(n,n) for n>=0.
A303921
Main diagonal of triangle A303920: a(n) = A303920(n,n) for n>=0.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =56a(4) =722a(5) =12012a(6) =246092a(7) =6002824a(8) =170048394a(9) =5489377628a(10) =198966923232
External references
- oeis: A303921