A341903 - cp's OEIS frontend

A341903 Lexicographically earliest sequence of nonnegative terms forming a clockwise square spiral when nothing else is read except the parity of the digits or the parity of the terms (see the Comments section).

n	a(n)
1	0
2	1
3	3
4	2
5	5
6	4
7	7
8	6
9	8
10	9
11	20
12	10
13	201
14	22
15	210
16	24
17	21
18	26
19	28
20	12
21	20001
22	40
23	42
24	212
25	44
26	2001
27	46
28	48
29	60
30	14
31	2000001
32	62
33	64
34	66
35	214
36	68
37	200001
38	80
39	82
40	84
41	86
42	16
43	200000001
44	88
45	200
46	202
47	216
48	204
49	206
50	2003
51	208
52	220
53	222
54	218
55	224
56	226
57	20003
58	228
59	240
60	242
61	2010
62	244
63	246
64	248
65	203
66	260
67	262
68	264
69	266
70	18

[0, 1, 3, 2, 5, 4, 7, 6, 8, 9, 20, 10, 201, 22, 210, 24, 21, 26, 28, 12, 20001, 40, 42, 212, 44, 2001, 46, 48, 60, 14, 2000001, 62, 64, 66, 214, 68, 200001, 80, 82, 84, 86, 16, 200000001, 88, 200, 202, 216, 204, 206, 2003, 208, 220, 222, 218, 224, 226, 20003, 228, 240, 242, 2010, 244, 246, 248, 203, 260, 262, 264, 266, 18]

cp's OEIS Frontend

A341903 Lexicographically earliest sequence of nonnegative terms forming a clockwise square spiral when nothing else is read except the parity of the digits or the parity of the terms (see the Comments section).

Table of values

List of values