A280914 - cp's OEIS frontend

A280914 Number of 2 X 2 matrices with all terms in {-n,...,0,...,n} and (sum of terms) = permanent.

n	a(n)
0	1
1	21
2	52
3	172
4	268
5	428
6	588
7	812
8	1004
9	1324
10	1580
11	1900
12	2252
13	2668
14	2988
15	3532
16	3916
17	4460
18	5004
19	5548
20	6028
21	6764
22	7308
23	8044
24	8716
25	9548
26	10156
27	11116
28	11852
29	12620
30	13548
31	14444
32	15244
33	16524
34	17228
35	18380
36	19340
37	20588
38	21548

[1, 21, 52, 172, 268, 428, 588, 812, 1004, 1324, 1580, 1900, 2252, 2668, 2988, 3532, 3916, 4460, 5004, 5548, 6028, 6764, 7308, 8044, 8716, 9548, 10156, 11116, 11852, 12620, 13548, 14444, 15244, 16524, 17228, 18380, 19340, 20588, 21548]

cp's OEIS Frontend

A280914 Number of 2 X 2 matrices with all terms in {-n,...,0,...,n} and (sum of terms) = permanent.

Table of values

List of values