A354111 - cp's OEIS frontend

A354111 Lexicographically earliest sequence of distinct nonnegative terms on a square spiral such that for any 2 X 2 square of numbers both the sum of those numbers and the sum of the digits of those numbers add up to a square. Start with a(0) = 0.

n	a(n)
0	0
1	1
2	2
3	6
4	3
5	7
6	4
7	5
8	19
9	8
10	141
11	25
12	9
13	133
14	28
15	132
16	10
17	24
18	135
19	23
20	11
21	131
22	29
23	91
24	26
25	12
26	98
27	378
28	32
29	78
30	13
31	44
32	39
33	124
34	157
35	230
36	14
37	275
38	220
39	105
40	178
41	229
42	15
43	69
44	365
45	51
46	54
47	153
48	385
49	16
50	163
51	303
52	62
53	104
54	227
55	123
56	17
57	43
58	476
59	66
60	212
61	83
62	106
63	134
64	18
65	30
66	210
67	195
68	56

[0, 1, 2, 6, 3, 7, 4, 5, 19, 8, 141, 25, 9, 133, 28, 132, 10, 24, 135, 23, 11, 131, 29, 91, 26, 12, 98, 378, 32, 78, 13, 44, 39, 124, 157, 230, 14, 275, 220, 105, 178, 229, 15, 69, 365, 51, 54, 153, 385, 16, 163, 303, 62, 104, 227, 123, 17, 43, 476, 66, 212, 83, 106, 134, 18, 30, 210, 195, 56]

cp's OEIS Frontend

A354111 Lexicographically earliest sequence of distinct nonnegative terms on a square spiral such that for any 2 X 2 square of numbers both the sum of those numbers and the sum of the digits of those numbers add up to a square. Start with a(0) = 0.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	6
4	3
5	7
6	4
7	5
8	19
9	8
10	141
11	25
12	9
13	133
14	28
15	132
16	10
17	24
18	135
19	23
20	11
21	131
22	29
23	91
24	26
25	12
26	98
27	378
28	32
29	78
30	13
31	44
32	39
33	124
34	157
35	230
36	14
37	275
38	220
39	105
40	178
41	229
42	15
43	69
44	365
45	51
46	54
47	153
48	385
49	16
50	163
51	303
52	62
53	104
54	227
55	123
56	17
57	43
58	476
59	66
60	212
61	83
62	106
63	134
64	18
65	30
66	210
67	195
68	56

n	a(n)
0	0
1	1
2	2
3	6
4	3
5	7
6	4
7	5
8	19
9	8
10	141
11	25
12	9
13	133
14	28
15	132
16	10
17	24
18	135
19	23
20	11
21	131
22	29
23	91
24	26
25	12
26	98
27	378
28	32
29	78
30	13
31	44
32	39
33	124
34	157
35	230
36	14
37	275
38	220
39	105
40	178
41	229
42	15
43	69
44	365
45	51
46	54
47	153
48	385
49	16
50	163
51	303
52	62
53	104
54	227
55	123
56	17
57	43
58	476
59	66
60	212
61	83
62	106
63	134
64	18
65	30
66	210
67	195
68	56

n	a(n)
0	0
1	1
2	2
3	6
4	3
5	7
6	4
7	5
8	19
9	8
10	141
11	25
12	9
13	133
14	28
15	132
16	10
17	24
18	135
19	23
20	11
21	131
22	29
23	91
24	26
25	12
26	98
27	378
28	32
29	78
30	13
31	44
32	39
33	124
34	157
35	230
36	14
37	275
38	220
39	105
40	178
41	229
42	15
43	69
44	365
45	51
46	54
47	153
48	385
49	16
50	163
51	303
52	62
53	104
54	227
55	123
56	17
57	43
58	476
59	66
60	212
61	83
62	106
63	134
64	18
65	30
66	210
67	195
68	56