A210289 - cp's OEIS frontend

A210289 Number of 2 X 2 matrices with all elements in {0,1,...,n} and permanent = (trace)^2.

n	a(n)
0	1
1	5
2	9
3	15
4	25
5	29
6	35
7	53
8	63
9	81
10	85
11	89
12	107
13	141
14	159
15	165
16	193
17	197
18	215
19	261
20	271
21	323
22	327
23	331
24	349
25	389
26	423
27	461
28	529
29	533
30	539
31	617
32	645
33	651
34	655
35	673
36	727
37	817
38	863
39	959
40	969
41	973
42	1025
43	1131
44	1141
45	1159

[1, 5, 9, 15, 25, 29, 35, 53, 63, 81, 85, 89, 107, 141, 159, 165, 193, 197, 215, 261, 271, 323, 327, 331, 349, 389, 423, 461, 529, 533, 539, 617, 645, 651, 655, 673, 727, 817, 863, 959, 969, 973, 1025, 1131, 1141, 1159]

cp's OEIS Frontend

A210289 Number of 2 X 2 matrices with all elements in {0,1,...,n} and permanent = (trace)^2.

Table of values

List of values