A354375 - cp's OEIS frontend

A354375 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 square and those sums themselves form another infinite 2D square lattice with the same property.

n	a(n)
1	0
2	1
3	2
4	6
5	3
6	999
7	4
8	5
9	12
10	7
11	799
12	8
13	9
14	89
15	29
16	79
17	10
18	88
19	8999
20	69
21	11
22	78
23	39
24	97
25	19
26	13
27	87
28	7999
29	59
30	14
31	15
32	169
33	39999
34	68
35	49999
36	699
37	16
38	22
39	96
40	159
41	178
42	21
43	17
44	599
45	59999
46	49
47	58999
48	168
49	25
50	18
51	187
52	100
53	4999
54	20
55	177
56	28
57	23
58	186
59	89999
60	99999
61	199999
62	98999
63	9999
64	77
65	24
66	27

[0, 1, 2, 6, 3, 999, 4, 5, 12, 7, 799, 8, 9, 89, 29, 79, 10, 88, 8999, 69, 11, 78, 39, 97, 19, 13, 87, 7999, 59, 14, 15, 169, 39999, 68, 49999, 699, 16, 22, 96, 159, 178, 21, 17, 599, 59999, 49, 58999, 168, 25, 18, 187, 100, 4999, 20, 177, 28, 23, 186, 89999, 99999, 199999, 98999, 9999, 77, 24, 27]

cp's OEIS Frontend

A354375 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 square and those sums themselves form another infinite 2D square lattice with the same property.

Table of values

List of values