A026491 - cp's OEIS frontend

A026491 a(n) = least k > a(n-1) such that A001285(k-1) = A001285(n-1) for n >= 1.

n	a(n)
0	1
1	4
2	5
3	8
4	10
5	12
6	13
7	16
8	17
9	20
10	21
11	24
12	26
13	28
14	29
15	32
16	34
17	36
18	37
19	40
20	42
21	44
22	45
23	48
24	49
25	52
26	53
27	56
28	58
29	60
30	61
31	64
32	65
33	68
34	69
35	72
36	74
37	76
38	77
39	80
40	81
41	84
42	85
43	88
44	90
45	92
46	93
47	96
48	98
49	100
50	101
51	104
52	106
53	108
54	109
55	112
56	113
57	116
58	117

[1, 4, 5, 8, 10, 12, 13, 16, 17, 20, 21, 24, 26, 28, 29, 32, 34, 36, 37, 40, 42, 44, 45, 48, 49, 52, 53, 56, 58, 60, 61, 64, 65, 68, 69, 72, 74, 76, 77, 80, 81, 84, 85, 88, 90, 92, 93, 96, 98, 100, 101, 104, 106, 108, 109, 112, 113, 116, 117]

cp's OEIS Frontend

A026491 a(n) = least k > a(n-1) such that A001285(k-1) = A001285(n-1) for n >= 1.

Table of values

List of values

n	a(n)
0	1
1	4
2	5
3	8
4	10
5	12
6	13
7	16
8	17
9	20
10	21
11	24
12	26
13	28
14	29
15	32
16	34
17	36
18	37
19	40
20	42
21	44
22	45
23	48
24	49
25	52
26	53
27	56
28	58
29	60
30	61
31	64
32	65
33	68
34	69
35	72
36	74
37	76
38	77
39	80
40	81
41	84
42	85
43	88
44	90
45	92
46	93
47	96
48	98
49	100
50	101
51	104
52	106
53	108
54	109
55	112
56	113
57	116
58	117

n	a(n)
0	1
1	4
2	5
3	8
4	10
5	12
6	13
7	16
8	17
9	20
10	21
11	24
12	26
13	28
14	29
15	32
16	34
17	36
18	37
19	40
20	42
21	44
22	45
23	48
24	49
25	52
26	53
27	56
28	58
29	60
30	61
31	64
32	65
33	68
34	69
35	72
36	74
37	76
38	77
39	80
40	81
41	84
42	85
43	88
44	90
45	92
46	93
47	96
48	98
49	100
50	101
51	104
52	106
53	108
54	109
55	112
56	113
57	116
58	117

n	a(n)
0	1
1	4
2	5
3	8
4	10
5	12
6	13
7	16
8	17
9	20
10	21
11	24
12	26
13	28
14	29
15	32
16	34
17	36
18	37
19	40
20	42
21	44
22	45
23	48
24	49
25	52
26	53
27	56
28	58
29	60
30	61
31	64
32	65
33	68
34	69
35	72
36	74
37	76
38	77
39	80
40	81
41	84
42	85
43	88
44	90
45	92
46	93
47	96
48	98
49	100
50	101
51	104
52	106
53	108
54	109
55	112
56	113
57	116
58	117