A226756 - cp's OEIS frontend

A226756 Number of elements X in the matrix ring M_2(Z_n) such that X^2 == X (mod n).

n	a(n)
1	1
2	8
3	14
4	26
5	32
6	112
7	58
8	98
9	110
10	256
11	134
12	364
13	184
14	464
15	448
16	386
17	308
18	880
19	382
20	832
21	812
22	1072
23	554
24	1372
25	752
26	1472
27	974
28	1508
29	872
30	3584
31	994
32	1538
33	1876
34	2464
35	1856
36	2860
37	1408
38	3056
39	2576
40	3136
41	1724
42	6496
43	1894
44	3484
45	3520
46	4432
47	2258
48	5404
49	2746

[1, 8, 14, 26, 32, 112, 58, 98, 110, 256, 134, 364, 184, 464, 448, 386, 308, 880, 382, 832, 812, 1072, 554, 1372, 752, 1472, 974, 1508, 872, 3584, 994, 1538, 1876, 2464, 1856, 2860, 1408, 3056, 2576, 3136, 1724, 6496, 1894, 3484, 3520, 4432, 2258, 5404, 2746]

cp's OEIS Frontend

A226756 Number of elements X in the matrix ring M_2(Z_n) such that X^2 == X (mod n).

Table of values

List of values