A137418 - cp's OEIS frontend

A137418 Limiting sequence when we start with positive integers (A000027) and at step n >= 1 add to the term at position n + digitsum(a(n)) the value digitsum(a(n)).

n	a(n)
1	1
2	3
3	3
4	4
5	8
6	9
7	7
8	12
9	9
10	10
11	15
12	12
13	21
14	21
15	27
16	19
17	26
18	27
19	19
20	20
21	21
22	24
23	23
24	36
25	33
26	36
27	36
28	39
29	39
30	30
31	37
32	32
33	45
34	34
35	44
36	45
37	42
38	38
39	39
40	52
41	70
42	51
43	57
44	44
45	54
46	46
47	54
48	61
49	60
50	50
51	63
52	60
53	53
54	63
55	85
56	75
57	57
58	64
59	59
60	69
61	69
62	62
63	72
64	64
65	65
66	66
67	67
68	103
69	81
70	78
71	71
72	85

[1, 3, 3, 4, 8, 9, 7, 12, 9, 10, 15, 12, 21, 21, 27, 19, 26, 27, 19, 20, 21, 24, 23, 36, 33, 36, 36, 39, 39, 30, 37, 32, 45, 34, 44, 45, 42, 38, 39, 52, 70, 51, 57, 44, 54, 46, 54, 61, 60, 50, 63, 60, 53, 63, 85, 75, 57, 64, 59, 69, 69, 62, 72, 64, 65, 66, 67, 103, 81, 78, 71, 85]

cp's OEIS Frontend

A137418 Limiting sequence when we start with positive integers (A000027) and at step n >= 1 add to the term at position n + digitsum(a(n)) the value digitsum(a(n)).

Table of values

List of values

n	a(n)
1	1
2	3
3	3
4	4
5	8
6	9
7	7
8	12
9	9
10	10
11	15
12	12
13	21
14	21
15	27
16	19
17	26
18	27
19	19
20	20
21	21
22	24
23	23
24	36
25	33
26	36
27	36
28	39
29	39
30	30
31	37
32	32
33	45
34	34
35	44
36	45
37	42
38	38
39	39
40	52
41	70
42	51
43	57
44	44
45	54
46	46
47	54
48	61
49	60
50	50
51	63
52	60
53	53
54	63
55	85
56	75
57	57
58	64
59	59
60	69
61	69
62	62
63	72
64	64
65	65
66	66
67	67
68	103
69	81
70	78
71	71
72	85

n	a(n)
1	1
2	3
3	3
4	4
5	8
6	9
7	7
8	12
9	9
10	10
11	15
12	12
13	21
14	21
15	27
16	19
17	26
18	27
19	19
20	20
21	21
22	24
23	23
24	36
25	33
26	36
27	36
28	39
29	39
30	30
31	37
32	32
33	45
34	34
35	44
36	45
37	42
38	38
39	39
40	52
41	70
42	51
43	57
44	44
45	54
46	46
47	54
48	61
49	60
50	50
51	63
52	60
53	53
54	63
55	85
56	75
57	57
58	64
59	59
60	69
61	69
62	62
63	72
64	64
65	65
66	66
67	67
68	103
69	81
70	78
71	71
72	85

n	a(n)
1	1
2	3
3	3
4	4
5	8
6	9
7	7
8	12
9	9
10	10
11	15
12	12
13	21
14	21
15	27
16	19
17	26
18	27
19	19
20	20
21	21
22	24
23	23
24	36
25	33
26	36
27	36
28	39
29	39
30	30
31	37
32	32
33	45
34	34
35	44
36	45
37	42
38	38
39	39
40	52
41	70
42	51
43	57
44	44
45	54
46	46
47	54
48	61
49	60
50	50
51	63
52	60
53	53
54	63
55	85
56	75
57	57
58	64
59	59
60	69
61	69
62	62
63	72
64	64
65	65
66	66
67	67
68	103
69	81
70	78
71	71
72	85