Triangle of coefficients of polynomials P(n; x) = Permanent(M), where M=[m(i,j)] is n X n matrix defined by m(i,j)=x if -1<=i-j<=1 else m(i,j)=1.

A080018

Triangle of coefficients of polynomials P(n; x) = Permanent(M), where M=[m(i,j)] is n X n matrix defined by m(i,j)=x if -1<=i-j<=1 else m(i,j)=1.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =2a(6) =0a(7) =1a(8) =2a(9) =3a(10) =1a(11) =2a(12) =10a(13) =6a(14) =5a(15) =4a(16) =20a(17) =28a(18) =44a(19) =16a(20) =8a(21) =29a(22) =104a(23) =207a(24) =180a(25) =151a(26) =36a(27) =13a(28) =206a(29) =775

External references