a(n) is the hafnian of a symmetric Toeplitz matrix of order 2*n whose off-diagonal element (i,j) equals the |i-j|-th prime.
A381514
a(n) is the hafnian of a symmetric Toeplitz matrix of order 2*n whose off-diagonal element (i,j) equals the |i-j|-th prime.
Terms
- a(0) =1a(1) =2a(2) =23a(3) =899a(4) =85072a(5) =15120411a(6) =4439935299
External references
- oeis: A381514