A261243 - cp's OEIS frontend

A261243 Row lengths of the irregular triangles A258643 and A261242: maximal number of 0-islands (holes) of certain bisymmetric n X n matrices with 0 or 1 entries only.

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	9
7	14
8	19
9	26
10	33
11	42
12	51
13	62
14	73
15	86
16	99
17	114
18	129
19	146
20	163
21	182
22	201
23	222
24	243
25	266
26	289
27	314
28	339
29	366
30	393
31	422
32	451
33	482
34	513
35	546
36	579
37	614
38	649
39	686
40	723
41	762
42	801
43	842
44	883
45	926

[1, 1, 2, 3, 6, 9, 14, 19, 26, 33, 42, 51, 62, 73, 86, 99, 114, 129, 146, 163, 182, 201, 222, 243, 266, 289, 314, 339, 366, 393, 422, 451, 482, 513, 546, 579, 614, 649, 686, 723, 762, 801, 842, 883, 926]

cp's OEIS Frontend

A261243 Row lengths of the irregular triangles A258643 and A261242: maximal number of 0-islands (holes) of certain bisymmetric n X n matrices with 0 or 1 entries only.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	9
7	14
8	19
9	26
10	33
11	42
12	51
13	62
14	73
15	86
16	99
17	114
18	129
19	146
20	163
21	182
22	201
23	222
24	243
25	266
26	289
27	314
28	339
29	366
30	393
31	422
32	451
33	482
34	513
35	546
36	579
37	614
38	649
39	686
40	723
41	762
42	801
43	842
44	883
45	926

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	9
7	14
8	19
9	26
10	33
11	42
12	51
13	62
14	73
15	86
16	99
17	114
18	129
19	146
20	163
21	182
22	201
23	222
24	243
25	266
26	289
27	314
28	339
29	366
30	393
31	422
32	451
33	482
34	513
35	546
36	579
37	614
38	649
39	686
40	723
41	762
42	801
43	842
44	883
45	926

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	9
7	14
8	19
9	26
10	33
11	42
12	51
13	62
14	73
15	86
16	99
17	114
18	129
19	146
20	163
21	182
22	201
23	222
24	243
25	266
26	289
27	314
28	339
29	366
30	393
31	422
32	451
33	482
34	513
35	546
36	579
37	614
38	649
39	686
40	723
41	762
42	801
43	842
44	883
45	926