A353435 - cp's OEIS frontend

A353435 Array read by descending antidiagonals: T(n,m) is the number of sequences of length n >= 0 with elements in 0..m-1 such that the Hankel matrix of any odd number of consecutive terms is invertible over the ring of integers modulo m >= 1.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	1
10	1
11	2
12	4
13	0
14	1
15	1
16	4
17	4
18	4
19	0
20	1
21	1
22	2
23	16
24	0
25	4
26	0
27	1
28	1
29	6
30	4
31	48
32	0
33	0
34	0
35	1
36	1
37	4
38	36
39	0
40	144
41	0
42	0
43	0
44	1
45	1
46	6
47	16
48	180
49	0
50	320
51	0
52	0
53	0
54	1
55	1
56	4
57	36
58	0
59	900
60	0
61	720
62	0
63	0
64	0
65	1
66	1
67	10
68	16
69	108
70	0
71	3744
72	0
73	1312
74	0
75	0
76	0
77	1

[1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 4, 0, 1, 1, 4, 4, 4, 0, 1, 1, 2, 16, 0, 4, 0, 1, 1, 6, 4, 48, 0, 0, 0, 1, 1, 4, 36, 0, 144, 0, 0, 0, 1, 1, 6, 16, 180, 0, 320, 0, 0, 0, 1, 1, 4, 36, 0, 900, 0, 720, 0, 0, 0, 1, 1, 10, 16, 108, 0, 3744, 0, 1312, 0, 0, 0, 1]

cp's OEIS Frontend

A353435 Array read by descending antidiagonals: T(n,m) is the number of sequences of length n >= 0 with elements in 0..m-1 such that the Hankel matrix of any odd number of consecutive terms is invertible over the ring of integers modulo m >= 1.

Table of values

List of values