A328718 - cp's OEIS frontend

A328718 Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of (1 + x_1 + x_2 + ... + x_n + 1/x_1 + 1/x_2 + ... + 1/x_n)^k.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	1
9	1
10	1
11	7
12	5
13	1
14	1
15	1
16	19
17	13
18	7
19	1
20	1
21	1
22	51
23	61
24	19
25	9
26	1
27	1
28	1
29	141
30	221
31	127
32	25
33	11
34	1
35	1
36	1
37	393
38	1001
39	511
40	217
41	31
42	13
43	1
44	1
45	1
46	1107
47	4145
48	3301
49	921
50	331
51	37
52	15
53	1
54	1
55	1
56	3139
57	18733
58	16297
59	7761
60	1451
61	469
62	43
63	17
64	1
65	1

[1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 7, 5, 1, 1, 1, 19, 13, 7, 1, 1, 1, 51, 61, 19, 9, 1, 1, 1, 141, 221, 127, 25, 11, 1, 1, 1, 393, 1001, 511, 217, 31, 13, 1, 1, 1, 1107, 4145, 3301, 921, 331, 37, 15, 1, 1, 1, 3139, 18733, 16297, 7761, 1451, 469, 43, 17, 1, 1]

cp's OEIS Frontend

A328718 Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the constant term in the expansion of (1 + x_1 + x_2 + ... + x_n + 1/x_1 + 1/x_2 + ... + 1/x_n)^k.

Table of values

List of values