A257664 - cp's OEIS frontend

A257664 a(1)=1; a(n+1) is the smallest positive integer not yet used where the digits of the decimal expansion (disregarding all leading and trailing zeros) of a(n)/a(n+1) have no digit in common with either a(n) or a(n+1).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	8
8	11
9	15
10	25
11	22
12	20
13	24
14	27
15	9
16	12
17	16
18	32
19	33
20	30
21	40
22	18
23	36
24	44
25	37
26	45
27	50
28	60
29	48
30	64
31	72
32	54
33	55
34	66
35	73
36	77
37	7
38	14
39	21
40	28
41	42
42	70
43	35
44	75
45	82
46	110
47	41
48	108
49	111
50	125
51	132
52	135
53	150
54	225
55	202
56	220
57	200
58	240
59	80
60	120
61	128
62	192
63	216
64	243
65	270

[1, 2, 3, 4, 5, 6, 8, 11, 15, 25, 22, 20, 24, 27, 9, 12, 16, 32, 33, 30, 40, 18, 36, 44, 37, 45, 50, 60, 48, 64, 72, 54, 55, 66, 73, 77, 7, 14, 21, 28, 42, 70, 35, 75, 82, 110, 41, 108, 111, 125, 132, 135, 150, 225, 202, 220, 200, 240, 80, 120, 128, 192, 216, 243, 270]

cp's OEIS Frontend

A257664 a(1)=1; a(n+1) is the smallest positive integer not yet used where the digits of the decimal expansion (disregarding all leading and trailing zeros) of a(n)/a(n+1) have no digit in common with either a(n) or a(n+1).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	8
8	11
9	15
10	25
11	22
12	20
13	24
14	27
15	9
16	12
17	16
18	32
19	33
20	30
21	40
22	18
23	36
24	44
25	37
26	45
27	50
28	60
29	48
30	64
31	72
32	54
33	55
34	66
35	73
36	77
37	7
38	14
39	21
40	28
41	42
42	70
43	35
44	75
45	82
46	110
47	41
48	108
49	111
50	125
51	132
52	135
53	150
54	225
55	202
56	220
57	200
58	240
59	80
60	120
61	128
62	192
63	216
64	243
65	270

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	8
8	11
9	15
10	25
11	22
12	20
13	24
14	27
15	9
16	12
17	16
18	32
19	33
20	30
21	40
22	18
23	36
24	44
25	37
26	45
27	50
28	60
29	48
30	64
31	72
32	54
33	55
34	66
35	73
36	77
37	7
38	14
39	21
40	28
41	42
42	70
43	35
44	75
45	82
46	110
47	41
48	108
49	111
50	125
51	132
52	135
53	150
54	225
55	202
56	220
57	200
58	240
59	80
60	120
61	128
62	192
63	216
64	243
65	270

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	8
8	11
9	15
10	25
11	22
12	20
13	24
14	27
15	9
16	12
17	16
18	32
19	33
20	30
21	40
22	18
23	36
24	44
25	37
26	45
27	50
28	60
29	48
30	64
31	72
32	54
33	55
34	66
35	73
36	77
37	7
38	14
39	21
40	28
41	42
42	70
43	35
44	75
45	82
46	110
47	41
48	108
49	111
50	125
51	132
52	135
53	150
54	225
55	202
56	220
57	200
58	240
59	80
60	120
61	128
62	192
63	216
64	243
65	270