a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th prime or 1 if i = j.

A374067

a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th prime or 1 if i = j.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =42a(4) =753a(5) =22969a(6) =1226225a(7) =98413280a(8) =11551199289

External references