Triangle formed by coefficients of the expansion of p(x,n) = (1-x)^(2*n + 1)*Sum_{j >= 0} (1 +j +j^2)^n * x^j.
A156985
Triangle formed by coefficients of the expansion of p(x,n) = (1-x)^(2*n + 1)*Sum_{j >= 0} (1 +j +j^2)^n * x^j.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =4a(6) =14a(7) =4a(8) =1a(9) =1a(10) =20a(11) =175a(12) =328a(13) =175a(14) =20a(15) =1a(16) =1a(17) =72a(18) =1708a(19) =9784a(20) =17190a(21) =9784a(22) =1708a(23) =72a(24) =1a(25) =1a(26) =232a(27) =14189a(28) =199616a(29) =884498
External references
- oeis: A156985