A213991 - cp's OEIS frontend

A213991 Number of 2 X 2 0..n matrices whose square is also a 0..n matrix.

n	a(n)
1	11
2	24
3	36
4	72
5	92
6	126
7	148
8	183
9	243
10	291
11	321
12	391
13	431
14	461
15	521
16	639
17	677
18	764
19	812
20	906
21	980
22	1040
23	1062
24	1196
25	1362
26	1414
27	1492
28	1632
29	1696
30	1836
31	1912
32	2011
33	2097
34	2177
35	2269
36	2565
37	2667
38	2723
39	2825
40	3067
41	3145
42	3319
43	3377
44	3523
45	3699
46	3803
47	3821

[11, 24, 36, 72, 92, 126, 148, 183, 243, 291, 321, 391, 431, 461, 521, 639, 677, 764, 812, 906, 980, 1040, 1062, 1196, 1362, 1414, 1492, 1632, 1696, 1836, 1912, 2011, 2097, 2177, 2269, 2565, 2667, 2723, 2825, 3067, 3145, 3319, 3377, 3523, 3699, 3803, 3821]

cp's OEIS Frontend

A213991 Number of 2 X 2 0..n matrices whose square is also a 0..n matrix.

Table of values

List of values