Triangle read by rows: coefficients of expansion in powers of x of the polynomials defined by p(n, x) = (2*n - 1)*p(n - 1, x) + (n - 1)^2*x^2*p(n - 2, x).
A123244
Triangle read by rows: coefficients of expansion in powers of x of the polynomials defined by p(n, x) = (2*n - 1)*p(n - 1, x) + (n - 1)^2*x^2*p(n - 2, x).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =15a(7) =15a(8) =9a(9) =4a(10) =105a(11) =105a(12) =90a(13) =55a(14) =9a(15) =945a(16) =945a(17) =1050a(18) =735a(19) =225a(20) =64a(21) =10395a(22) =10395a(23) =14175a(24) =10710a(25) =4725a(26) =2079a(27) =225a(28) =135135a(29) =135135
External references
- oeis: A123244