A280343 - cp's OEIS frontend

A280343 Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2*permanent.

n	a(n)
0	1
1	25
2	81
3	233
4	401
5	585
6	1009
7	1289
8	1681
9	2377
10	2913
11	3353
12	4497
13	5033
14	5793
15	7097
16	8065
17	8761
18	10721
19	11513
20	12961
21	14873
22	16113
23	17065
24	19873
25	21225
26	22689
27	25465
28	27585
29	28793
30	32561
31	33865
32	36113
33	39177
34	41121
35	43481
36	48801
37	50361
38	52529
39	56201
40	59793

[1, 25, 81, 233, 401, 585, 1009, 1289, 1681, 2377, 2913, 3353, 4497, 5033, 5793, 7097, 8065, 8761, 10721, 11513, 12961, 14873, 16113, 17065, 19873, 21225, 22689, 25465, 27585, 28793, 32561, 33865, 36113, 39177, 41121, 43481, 48801, 50361, 52529, 56201, 59793]

cp's OEIS Frontend

A280343 Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2*permanent.

Table of values

List of values