A191965 - cp's OEIS frontend

A191965 A problem of Zarankiewicz: maximal number of 1's in a symmetric n X n matrix of 0's and 1's with 0's on the main diagonal and no "rectangle" with 1's at the four corners.

n	a(n)
1	0
2	2
3	6
4	8
5	12
6	14
7	18
8	22
9	26
10	32
11	36
12	42
13	48
14	54
15	60
16	66
17	72
18	78
19	84
20	92
21	100
22	104
23	112
24	118
25	126
26	134
27	142
28	152
29	160
30	170
31	180
32	184
33	192
34	204
35	212
36	220
37	226
38	234
39	244
40	254

[0, 2, 6, 8, 12, 14, 18, 22, 26, 32, 36, 42, 48, 54, 60, 66, 72, 78, 84, 92, 100, 104, 112, 118, 126, 134, 142, 152, 160, 170, 180, 184, 192, 204, 212, 220, 226, 234, 244, 254]

cp's OEIS Frontend

A191965 A problem of Zarankiewicz: maximal number of 1's in a symmetric n X n matrix of 0's and 1's with 0's on the main diagonal and no "rectangle" with 1's at the four corners.

Table of values

List of values

n	a(n)
1	0
2	2
3	6
4	8
5	12
6	14
7	18
8	22
9	26
10	32
11	36
12	42
13	48
14	54
15	60
16	66
17	72
18	78
19	84
20	92
21	100
22	104
23	112
24	118
25	126
26	134
27	142
28	152
29	160
30	170
31	180
32	184
33	192
34	204
35	212
36	220
37	226
38	234
39	244
40	254

n	a(n)
1	0
2	2
3	6
4	8
5	12
6	14
7	18
8	22
9	26
10	32
11	36
12	42
13	48
14	54
15	60
16	66
17	72
18	78
19	84
20	92
21	100
22	104
23	112
24	118
25	126
26	134
27	142
28	152
29	160
30	170
31	180
32	184
33	192
34	204
35	212
36	220
37	226
38	234
39	244
40	254

n	a(n)
1	0
2	2
3	6
4	8
5	12
6	14
7	18
8	22
9	26
10	32
11	36
12	42
13	48
14	54
15	60
16	66
17	72
18	78
19	84
20	92
21	100
22	104
23	112
24	118
25	126
26	134
27	142
28	152
29	160
30	170
31	180
32	184
33	192
34	204
35	212
36	220
37	226
38	234
39	244
40	254