A372223 - cp's OEIS frontend

A372223 Numbers in a hexagonal tiling (seen as concentric rings) which have exactly three neighbors whose difference from it is prime.

n	a(n)
1	1
2	2
3	8
4	19
5	20
6	37
7	61
8	128
9	217
10	271
11	398
12	919
13	1519
14	1520
15	2978
16	3170
17	4220
18	4447
19	4681
20	5677
21	5941
22	6488
23	8269
24	9920
25	10621
26	12481
27	16651
28	17558
29	22448
30	26227
31	29701
32	34028
33	34669
34	35317
35	35971
36	56719
37	60920
38	61777
39	74419
40	75367
41	80197
42	88238
43	93458

[1, 2, 8, 19, 20, 37, 61, 128, 217, 271, 398, 919, 1519, 1520, 2978, 3170, 4220, 4447, 4681, 5677, 5941, 6488, 8269, 9920, 10621, 12481, 16651, 17558, 22448, 26227, 29701, 34028, 34669, 35317, 35971, 56719, 60920, 61777, 74419, 75367, 80197, 88238, 93458]

cp's OEIS Frontend

A372223 Numbers in a hexagonal tiling (seen as concentric rings) which have exactly three neighbors whose difference from it is prime.

Table of values

List of values