a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 0 if i = j.

A374070

a(n) is the permanent of the symmetric Toeplitz matrix of order n whose element (i,j) equals the |i-j|-th composite or 0 if i = j.

Terms

    a(0) =1a(1) =0a(2) =16a(3) =192a(4) =7056a(5) =296928a(6) =17353552a(7) =1288517448a(8) =123247560033

External references