A354373 - cp's OEIS frontend

A354373 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.

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	15
16	13
17	16
18	18
19	23
20	21
21	17
22	25
23	27
24	19
25	22
26	20
27	24
28	34
29	33
30	30
31	26
32	32
33	28
34	35
35	29
36	36
37	31
38	38
39	37
40	41
41	40
42	44
43	39
44	45
45	43
46	42
47	48
48	47
49	51
50	46
51	49
52	53
53	55
54	59
55	60
56	57
57	50
58	66
59	75
60	64
61	54
62	58
63	62
64	71
65	52
66	73
67	79
68	82
69	84
70	80
71	56
72	88
73	61
74	93
75	68
76	65
77	67
78	91

[0, 1, 2, 4, 3, 6, 5, 8, 11, 7, 9, 10, 12, 14, 15, 13, 16, 18, 23, 21, 17, 25, 27, 19, 22, 20, 24, 34, 33, 30, 26, 32, 28, 35, 29, 36, 31, 38, 37, 41, 40, 44, 39, 45, 43, 42, 48, 47, 51, 46, 49, 53, 55, 59, 60, 57, 50, 66, 75, 64, 54, 58, 62, 71, 52, 73, 79, 82, 84, 80, 56, 88, 61, 93, 68, 65, 67, 91]

cp's OEIS Frontend

A354373 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.

Table of values

List of values

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	15
16	13
17	16
18	18
19	23
20	21
21	17
22	25
23	27
24	19
25	22
26	20
27	24
28	34
29	33
30	30
31	26
32	32
33	28
34	35
35	29
36	36
37	31
38	38
39	37
40	41
41	40
42	44
43	39
44	45
45	43
46	42
47	48
48	47
49	51
50	46
51	49
52	53
53	55
54	59
55	60
56	57
57	50
58	66
59	75
60	64
61	54
62	58
63	62
64	71
65	52
66	73
67	79
68	82
69	84
70	80
71	56
72	88
73	61
74	93
75	68
76	65
77	67
78	91

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	15
16	13
17	16
18	18
19	23
20	21
21	17
22	25
23	27
24	19
25	22
26	20
27	24
28	34
29	33
30	30
31	26
32	32
33	28
34	35
35	29
36	36
37	31
38	38
39	37
40	41
41	40
42	44
43	39
44	45
45	43
46	42
47	48
48	47
49	51
50	46
51	49
52	53
53	55
54	59
55	60
56	57
57	50
58	66
59	75
60	64
61	54
62	58
63	62
64	71
65	52
66	73
67	79
68	82
69	84
70	80
71	56
72	88
73	61
74	93
75	68
76	65
77	67
78	91

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	15
16	13
17	16
18	18
19	23
20	21
21	17
22	25
23	27
24	19
25	22
26	20
27	24
28	34
29	33
30	30
31	26
32	32
33	28
34	35
35	29
36	36
37	31
38	38
39	37
40	41
41	40
42	44
43	39
44	45
45	43
46	42
47	48
48	47
49	51
50	46
51	49
52	53
53	55
54	59
55	60
56	57
57	50
58	66
59	75
60	64
61	54
62	58
63	62
64	71
65	52
66	73
67	79
68	82
69	84
70	80
71	56
72	88
73	61
74	93
75	68
76	65
77	67
78	91