A333774 - cp's OEIS frontend

A333774 a(0) = 0; for n > 0, a(n) = the smallest positive integer not yet appearing in the sequence such that a(n-1) + a(n) contains as a substring either a(n-1) or a(n).

n	a(n)
0	0
1	1
2	9
3	10
4	2
5	18
6	100
7	3
8	20
9	4
10	30
11	5
12	40
13	6
14	50
15	7
16	60
17	8
18	70
19	200
20	11
21	99
22	300
23	12
24	108
25	972
26	107
27	963
28	106
29	954
30	105
31	945
32	104
33	936
34	103
35	927
36	102
37	918
38	101
39	909
40	1000
41	13
42	117
43	1053
44	116
45	1044
46	115
47	1035
48	114
49	1026
50	113
51	1017
52	112
53	1008
54	111
55	999
56	110
57	990
58	109
59	981
60	2000
61	14

[0, 1, 9, 10, 2, 18, 100, 3, 20, 4, 30, 5, 40, 6, 50, 7, 60, 8, 70, 200, 11, 99, 300, 12, 108, 972, 107, 963, 106, 954, 105, 945, 104, 936, 103, 927, 102, 918, 101, 909, 1000, 13, 117, 1053, 116, 1044, 115, 1035, 114, 1026, 113, 1017, 112, 1008, 111, 999, 110, 990, 109, 981, 2000, 14]

cp's OEIS Frontend

A333774 a(0) = 0; for n > 0, a(n) = the smallest positive integer not yet appearing in the sequence such that a(n-1) + a(n) contains as a substring either a(n-1) or a(n).

Table of values

List of values