A211055 - cp's OEIS frontend

A211055 Number of 2 X 2 matrices having all terms in {1,...,n} and determinant n+1.

n	a(n)
1	0
2	1
3	4
4	9
5	20
6	23
7	51
8	55
9	88
10	79
11	181
12	121
13	214
14	222
15	323
16	227
17	484
18	299
19	605
20	488
21	604
22	457
23	1102
24	623
25	902
26	876
27	1269
28	769
29	1754
30	893
31	1728
32	1370
33	1634
34	1436
35	2811
36	1303
37	2100
38	1964
39	3184
40	1637
41	3622
42	1823
43	3403
44	3171
45	3138

[0, 1, 4, 9, 20, 23, 51, 55, 88, 79, 181, 121, 214, 222, 323, 227, 484, 299, 605, 488, 604, 457, 1102, 623, 902, 876, 1269, 769, 1754, 893, 1728, 1370, 1634, 1436, 2811, 1303, 2100, 1964, 3184, 1637, 3622, 1823, 3403, 3171, 3138]

cp's OEIS Frontend

A211055 Number of 2 X 2 matrices having all terms in {1,...,n} and determinant n+1.

Table of values

List of values