a(n) is the hafnian of a symmetric Toeplitz matrix M(2*n) whose first row consists of prime(2*n), prime(2*n-1), ..., prime(1).

A356484

a(n) is the hafnian of a symmetric Toeplitz matrix M(2*n) whose first row consists of prime(2*n), prime(2*n-1), ..., prime(1).

Terms

    a(0) =1a(1) =2a(2) =44a(3) =5210a(4) =1368900a(5) =604109562a(6) =535920536336

External references