A224665 - cp's OEIS frontend

A224665 T(n,k)=Number of n X n 0..k matrices with each 2X2 subblock idempotent.

n	a(n)
1	2
2	3
3	8
4	4
5	12
6	32
7	5
8	16
9	50
10	78
11	6
12	20
13	72
14	108
15	196
16	7
17	24
18	98
19	142
20	260
21	428
22	8
23	28
24	128
25	180
26	332
27	542
28	916
29	9
30	32
31	162
32	222
33	412
34	668
35	1126
36	1858
37	10
38	36
39	200
40	268
41	500
42	806
43	1356
44	2230
45	3678
46	11
47	40
48	242
49	318
50	596
51	956
52	1606
53	2634
54	4336
55	7096
56	12
57	44
58	288
59	372

[2, 3, 8, 4, 12, 32, 5, 16, 50, 78, 6, 20, 72, 108, 196, 7, 24, 98, 142, 260, 428, 8, 28, 128, 180, 332, 542, 916, 9, 32, 162, 222, 412, 668, 1126, 1858, 10, 36, 200, 268, 500, 806, 1356, 2230, 3678, 11, 40, 242, 318, 596, 956, 1606, 2634, 4336, 7096, 12, 44, 288, 372]

cp's OEIS Frontend

A224665 T(n,k)=Number of n X n 0..k matrices with each 2X2 subblock idempotent.

Table of values

List of values