A362209 - cp's OEIS frontend

A362209 Irregular triangle read by rows: T(n, k) is the number of k X k matrices using all the integers from 1 to k^2 and having trace equal to n, with 1 <= k <= A003056(n).

n	a(n)
1	1
2	0
3	0
4	4
5	0
6	4
7	0
8	8
9	0
10	4
11	4320
12	0
13	4
14	4320
15	0
16	0
17	8640
18	0
19	0
20	12960
21	0
22	0
23	17280
24	11496038400
25	0
26	0
27	21600
28	11496038400
29	0
30	0
31	30240
32	22992076800
33	0
34	0
35	30240
36	34488115200
37	0
38	0
39	34560
40	57480192000
41	0
42	0
43	34560
44	68976230400
45	291948240981196800000

[1, 0, 0, 4, 0, 4, 0, 8, 0, 4, 4320, 0, 4, 4320, 0, 0, 8640, 0, 0, 12960, 0, 0, 17280, 11496038400, 0, 0, 21600, 11496038400, 0, 0, 30240, 22992076800, 0, 0, 30240, 34488115200, 0, 0, 34560, 57480192000, 0, 0, 34560, 68976230400, 291948240981196800000]

cp's OEIS Frontend

A362209 Irregular triangle read by rows: T(n, k) is the number of k X k matrices using all the integers from 1 to k^2 and having trace equal to n, with 1 <= k <= A003056(n).

Table of values

List of values