A053307 - cp's OEIS frontend

A053307 Number of nonnegative integer 2 X 2 matrices with sum of elements equal to n, under row and column permutations.

n	a(n)
0	1
1	1
2	4
3	5
4	11
5	14
6	24
7	30
8	45
9	55
10	76
11	91
12	119
13	140
14	176
15	204
16	249
17	285
18	340
19	385
20	451
21	506
22	584
23	650
24	741
25	819
26	924
27	1015
28	1135
29	1240
30	1376
31	1496
32	1649
33	1785
34	1956
35	2109
36	2299
37	2470
38	2680
39	2870
40	3101
41	3311
42	3564
43	3795
44	4071
45	4324
46	4624
47	4900
48	5225
49	5525

[1, 1, 4, 5, 11, 14, 24, 30, 45, 55, 76, 91, 119, 140, 176, 204, 249, 285, 340, 385, 451, 506, 584, 650, 741, 819, 924, 1015, 1135, 1240, 1376, 1496, 1649, 1785, 1956, 2109, 2299, 2470, 2680, 2870, 3101, 3311, 3564, 3795, 4071, 4324, 4624, 4900, 5225, 5525]

cp's OEIS Frontend

A053307 Number of nonnegative integer 2 X 2 matrices with sum of elements equal to n, under row and column permutations.

Table of values

List of values