A031225 - cp's OEIS frontend

A031225 a(n)=least k such that base 5 representation of n begins at s(k), where s=A031219.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	1
8	11
9	13
10	15
11	10
12	19
13	2
14	23
15	25
16	12
17	22
18	31
19	3
20	35
21	4
22	14
23	24
24	34
25	45
26	5
27	51
28	54
29	57
30	50
31	7
32	8
33	69
34	72
35	75
36	9
37	18
38	1
39	87
40	90
41	11
42	28
43	99
44	102
45	105
46	73
47	13
48	114
49	117
50	120
51	76
52	15
53	129
54	132
55	53
56	68
57	17
58	10
59	113
60	128
61	82
62	19
63	20

[1, 2, 3, 4, 5, 7, 1, 11, 13, 15, 10, 19, 2, 23, 25, 12, 22, 31, 3, 35, 4, 14, 24, 34, 45, 5, 51, 54, 57, 50, 7, 8, 69, 72, 75, 9, 18, 1, 87, 90, 11, 28, 99, 102, 105, 73, 13, 114, 117, 120, 76, 15, 129, 132, 53, 68, 17, 10, 113, 128, 82, 19, 20]

cp's OEIS Frontend

A031225 a(n)=least k such that base 5 representation of n begins at s(k), where s=A031219.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	1
8	11
9	13
10	15
11	10
12	19
13	2
14	23
15	25
16	12
17	22
18	31
19	3
20	35
21	4
22	14
23	24
24	34
25	45
26	5
27	51
28	54
29	57
30	50
31	7
32	8
33	69
34	72
35	75
36	9
37	18
38	1
39	87
40	90
41	11
42	28
43	99
44	102
45	105
46	73
47	13
48	114
49	117
50	120
51	76
52	15
53	129
54	132
55	53
56	68
57	17
58	10
59	113
60	128
61	82
62	19
63	20

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	1
8	11
9	13
10	15
11	10
12	19
13	2
14	23
15	25
16	12
17	22
18	31
19	3
20	35
21	4
22	14
23	24
24	34
25	45
26	5
27	51
28	54
29	57
30	50
31	7
32	8
33	69
34	72
35	75
36	9
37	18
38	1
39	87
40	90
41	11
42	28
43	99
44	102
45	105
46	73
47	13
48	114
49	117
50	120
51	76
52	15
53	129
54	132
55	53
56	68
57	17
58	10
59	113
60	128
61	82
62	19
63	20

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	1
8	11
9	13
10	15
11	10
12	19
13	2
14	23
15	25
16	12
17	22
18	31
19	3
20	35
21	4
22	14
23	24
24	34
25	45
26	5
27	51
28	54
29	57
30	50
31	7
32	8
33	69
34	72
35	75
36	9
37	18
38	1
39	87
40	90
41	11
42	28
43	99
44	102
45	105
46	73
47	13
48	114
49	117
50	120
51	76
52	15
53	129
54	132
55	53
56	68
57	17
58	10
59	113
60	128
61	82
62	19
63	20