A218146 - cp's OEIS frontend

A218146 The number of centered circles that can form hexagonal symmetry. Contains all hexagonal numbers.

n	a(n)
1	1
2	7
3	13
4	19
5	31
6	37
7	43
8	55
9	61
10	91
11	97
12	109
13	121
14	127
15	139
16	151
17	163
18	169
19	217
20	229
21	241
22	253
23	265
24	271
25	283
26	295
27	307
28	319
29	331
30	343
31	355
32	367
33	379
34	391
35	397

[1, 7, 13, 19, 31, 37, 43, 55, 61, 91, 97, 109, 121, 127, 139, 151, 163, 169, 217, 229, 241, 253, 265, 271, 283, 295, 307, 319, 331, 343, 355, 367, 379, 391, 397]

cp's OEIS Frontend

A218146 The number of centered circles that can form hexagonal symmetry. Contains all hexagonal numbers.

Table of values

List of values

n	a(n)
1	1
2	7
3	13
4	19
5	31
6	37
7	43
8	55
9	61
10	91
11	97
12	109
13	121
14	127
15	139
16	151
17	163
18	169
19	217
20	229
21	241
22	253
23	265
24	271
25	283
26	295
27	307
28	319
29	331
30	343
31	355
32	367
33	379
34	391
35	397

n	a(n)
1	1
2	7
3	13
4	19
5	31
6	37
7	43
8	55
9	61
10	91
11	97
12	109
13	121
14	127
15	139
16	151
17	163
18	169
19	217
20	229
21	241
22	253
23	265
24	271
25	283
26	295
27	307
28	319
29	331
30	343
31	355
32	367
33	379
34	391
35	397

n	a(n)
1	1
2	7
3	13
4	19
5	31
6	37
7	43
8	55
9	61
10	91
11	97
12	109
13	121
14	127
15	139
16	151
17	163
18	169
19	217
20	229
21	241
22	253
23	265
24	271
25	283
26	295
27	307
28	319
29	331
30	343
31	355
32	367
33	379
34	391
35	397