A184948 - cp's OEIS frontend

A184948 Triangle read by rows: SM(n,m) is the number of symmetric 0-1 matrices of order n such that the total number of 1's is m (n >= 1, 0 <= m <= n^2).

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	2
7	1
8	1
9	3
10	6
11	10
12	12
13	12
14	10
15	6
16	3
17	1
18	1
19	4
20	12
21	28
22	52
23	84
24	116
25	140
26	150
27	140
28	116
29	84
30	52
31	28
32	12
33	4
34	1
35	1
36	5
37	20
38	60
39	150
40	326
41	620
42	1060
43	1635
44	2295
45	2952
46	3480
47	3780
48	3780
49	3480
50	2952
51	2295
52	1635
53	1060
54	620
55	326
56	150
57	60
58	20
59	5
60	1

[1, 1, 1, 2, 2, 2, 1, 1, 3, 6, 10, 12, 12, 10, 6, 3, 1, 1, 4, 12, 28, 52, 84, 116, 140, 150, 140, 116, 84, 52, 28, 12, 4, 1, 1, 5, 20, 60, 150, 326, 620, 1060, 1635, 2295, 2952, 3480, 3780, 3780, 3480, 2952, 2295, 1635, 1060, 620, 326, 150, 60, 20, 5, 1]

cp's OEIS Frontend

A184948 Triangle read by rows: SM(n,m) is the number of symmetric 0-1 matrices of order n such that the total number of 1's is m (n >= 1, 0 <= m <= n^2).

Table of values

List of values