a(n) is the permanent of the n-th order Hankel matrix of Catalan numbers M(n) whose generic element is given by M(i,j) = A000108(i+j) with i,j = 0, ..., n-1.
A368012
a(n) is the permanent of the n-th order Hankel matrix of Catalan numbers M(n) whose generic element is given by M(i,j) = A000108(i+j) with i,j = 0, ..., n-1.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =95a(4) =38057a(5) =207372681
External references
- oeis: A368012