A155718 - cp's OEIS frontend

A155718 Symmetrical form of A039683 using polynomials: p(x,n)=Product[x - (2i), {i, 0, Floor[n/2]}]/x; t(n,m)=coefficients(p(x,n)+x^np(1/x,n)); t(n,m)=A039683(n,m)+A039683(n,n-m).

n	a(n)
0	2
1	-1
2	-1
3	9
4	-12
5	9
6	-47
7	32
8	32
9	-47
10	385
11	-420
12	280
13	-420
14	385
15	-3839
16	4354
17	-1460
18	-1460
19	4354
20	-3839
21	46081
22	-56490
23	26684
24	-11760
25	26684
26	-56490
27	46081
28	-645119
29	836296
30	-418936
31	92624
32	92624
33	-418936
34	836296
35	-645119
36	10321921
37	-14026824

[2, -1, -1, 9, -12, 9, -47, 32, 32, -47, 385, -420, 280, -420, 385, -3839, 4354, -1460, -1460, 4354, -3839, 46081, -56490, 26684, -11760, 26684, -56490, 46081, -645119, 836296, -418936, 92624, 92624, -418936, 836296, -645119, 10321921, -14026824]

cp's OEIS Frontend

A155718 Symmetrical form of A039683 using polynomials: p(x,n)=Product[x - (2i), {i, 0, Floor[n/2]}]/x; t(n,m)=coefficients(p(x,n)+x^np(1/x,n)); t(n,m)=A039683(n,m)+A039683(n,n-m).

Table of values

List of values

cp's OEIS Frontend

A155718 Symmetrical form of A039683 using polynomials: p(x,n)=Product[x - (2*i), {i, 0, Floor[n/2]}]/x; t(n,m)=coefficients(p(x,n)+x^n*p(1/x,n)); t(n,m)=A039683(n,m)+A039683(n,n-m).

Table of values

List of values

A155718 Symmetrical form of A039683 using polynomials: p(x,n)=Product[x - (2i), {i, 0, Floor[n/2]}]/x; t(n,m)=coefficients(p(x,n)+x^np(1/x,n)); t(n,m)=A039683(n,m)+A039683(n,n-m).