Irregular triangle read by rows: first row is 1, and n-th row gives the coefficients of x^(n - 1)*R(n,x + 1/x)/(x + 1/x), where R(n,x) is the n-th row polynomial for A060187.
A143506
Irregular triangle read by rows: first row is 1, and n-th row gives the coefficients of x^(n - 1)*R(n,x + 1/x)/(x + 1/x), where R(n,x) is the n-th row polynomial for A060187.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =6a(6) =3a(7) =6a(8) =1a(9) =1a(10) =23a(11) =26a(12) =47a(13) =26a(14) =23a(15) =1a(16) =1a(17) =76a(18) =234a(19) =304a(20) =467a(21) =304a(22) =234a(23) =76a(24) =1a(25) =1a(26) =237a(27) =1687a(28) =2630a(29) =5293
External references
- oeis: A143506