A354374 - cp's OEIS frontend

A354374 Square spiral on a 2D square lattice, one term per cell, starting at the origin with 0; the digits of the four integers forming any 2 X 2 square add up to a prime and those sums themselves form another infinite 2D square lattice with the same property.

n	a(n)
1	0
2	1
3	2
4	4
5	3
6	6
7	5
8	8
9	11
10	7
11	9
12	10
13	12
14	14
15	17
16	13
17	15
18	19
19	39
20	24
21	16
22	23
23	29
24	5999
25	33
26	18
27	25
28	42
29	69
30	699
31	20
32	26
33	21
34	999
35	299
36	599
37	22
38	28
39	30
40	31
41	34
42	38
43	27
44	37
45	36
46	40
47	59
48	4999
49	43
50	32
51	35
52	41
53	49
54	102
55	47
56	69999
57	44
58	45
59	48
60	99
61	58
62	52
63	111
64	689
65	46
66	51
67	698
68	79999
69	9999999
70	50
71	68

[0, 1, 2, 4, 3, 6, 5, 8, 11, 7, 9, 10, 12, 14, 17, 13, 15, 19, 39, 24, 16, 23, 29, 5999, 33, 18, 25, 42, 69, 699, 20, 26, 21, 999, 299, 599, 22, 28, 30, 31, 34, 38, 27, 37, 36, 40, 59, 4999, 43, 32, 35, 41, 49, 102, 47, 69999, 44, 45, 48, 99, 58, 52, 111, 689, 46, 51, 698, 79999, 9999999, 50, 68]

cp's OEIS Frontend

A354374 Square spiral on a 2D square lattice, one term per cell, starting at the origin with 0; the digits of the four integers forming any 2 X 2 square add up to a prime and those sums themselves form another infinite 2D square lattice with the same property.

Table of values

List of values