A329816 - cp's OEIS frontend

A329816 Triangular array, read by rows: T(n,k) = [(xy)^k] (-1 + (1 + x + 1/x)(1 + y + 1/y))^n for -n <= k <= n.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	2
6	8
7	2
8	1
9	1
10	6
11	27
12	24
13	27
14	6
15	1
16	1
17	12
18	70
19	132
20	216
21	132
22	70
23	12
24	1
25	1
26	20
27	155
28	480
29	1070
30	1200
31	1070
32	480
33	155
34	20
35	1
36	1
37	30
38	306
39	1370
40	4035
41	6900
42	8840
43	6900
44	4035
45	1370
46	306
47	30
48	1
49	1
50	42
51	553
52	3332
53	12621
54	29750
55	51065
56	58800
57	51065
58	29750
59	12621
60	3332
61	553
62	42
63	1

[1, 1, 0, 1, 1, 2, 8, 2, 1, 1, 6, 27, 24, 27, 6, 1, 1, 12, 70, 132, 216, 132, 70, 12, 1, 1, 20, 155, 480, 1070, 1200, 1070, 480, 155, 20, 1, 1, 30, 306, 1370, 4035, 6900, 8840, 6900, 4035, 1370, 306, 30, 1, 1, 42, 553, 3332, 12621, 29750, 51065, 58800, 51065, 29750, 12621, 3332, 553, 42, 1]

cp's OEIS Frontend

A329816 Triangular array, read by rows: T(n,k) = [(xy)^k] (-1 + (1 + x + 1/x)(1 + y + 1/y))^n for -n <= k <= n.

Table of values

List of values

cp's OEIS Frontend

A329816 Triangular array, read by rows: T(n,k) = [(x*y)^k] (-1 + (1 + x + 1/x)*(1 + y + 1/y))^n for -n <= k <= n.

Table of values

List of values

A329816 Triangular array, read by rows: T(n,k) = [(xy)^k] (-1 + (1 + x + 1/x)(1 + y + 1/y))^n for -n <= k <= n.