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A155951 Triangle read by rows. Let q(x,n) = -((x - 1)^(2*n + 1)/x^n)*Sum[(k + n)^n*Binomial[k, n]*x^k, {k, 0, Infinity}]; p(x,n)=q(x,n)+x^n*q(1/x,n); then row n gives coefficients of p(x,n).

Table of values

n a(n)
0 2
1 4
2 17
3 -10
4 17
5 208
6 -88
7 -88
8 208
9 4177
10 -4708
11 4422
12 -4708
13 4177
14 98976
15 -123888
16 55152
17 55152
18 -123888
19 98976
20 3001609
21 -5204582
22 5360567
23 -4984628
24 5360567
25 -5204582
26 3001609
27 105133568
28 -210753520
29 208361232
30 -85444000
31 -85444000

List of values

[2, 4, 17, -10, 17, 208, -88, -88, 208, 4177, -4708, 4422, -4708, 4177, 98976, -123888, 55152, 55152, -123888, 98976, 3001609, -5204582, 5360567, -4984628, 5360567, -5204582, 3001609, 105133568, -210753520, 208361232, -85444000, -85444000]