Irregular triangle read by rows: coefficients of polynomials arising in calculation of squares of certain web-coloring matrices.

A281351

Irregular triangle read by rows: coefficients of polynomials arising in calculation of squares of certain web-coloring matrices.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =6a(5) =12a(6) =6a(7) =1a(8) =26a(9) =73a(10) =72a(11) =24a(12) =12a(13) =156a(14) =516a(15) =732a(16) =480a(17) =120a(18) =2a(19) =126a(20) =1206a(21) =4322a(22) =7680a(23) =7320a(24) =3600a(25) =720a(26) =52a(27) =1408a(28) =11352a(29) =42448

External references