A117830 - cp's OEIS frontend

A117830 Let S_m be the infinite sequence formed by starting with m and repeatedly reversing the digits and adding 4 to get the next term. For all m < 1015, S_m enters the cycle of length 54 whose terms are shown here.

n	a(n)
1	5
2	9
3	13
4	35
5	57
6	79
7	101
8	105
9	505
10	509
11	909
12	913
13	323
14	327
15	727
16	731
17	141
18	145
19	545
20	549
21	949
22	953
23	363
24	367
25	767
26	771
27	181
28	185
29	585
30	589
31	989
32	993
33	403
34	308
35	807
36	712
37	221
38	126
39	625
40	530
41	39
42	97
43	83
44	42
45	28
46	86
47	72
48	31
49	17
50	75
51	61
52	20
53	6
54	10
55	5
56	9
57	13
58	35
59	57
60	79
61	101
62	105
63	505
64	509
65	909
66	913
67	323
68	327
69	727
70	731
71	141
72	145

[5, 9, 13, 35, 57, 79, 101, 105, 505, 509, 909, 913, 323, 327, 727, 731, 141, 145, 545, 549, 949, 953, 363, 367, 767, 771, 181, 185, 585, 589, 989, 993, 403, 308, 807, 712, 221, 126, 625, 530, 39, 97, 83, 42, 28, 86, 72, 31, 17, 75, 61, 20, 6, 10, 5, 9, 13, 35, 57, 79, 101, 105, 505, 509, 909, 913, 323, 327, 727, 731, 141, 145]

cp's OEIS Frontend

A117830 Let S_m be the infinite sequence formed by starting with m and repeatedly reversing the digits and adding 4 to get the next term. For all m < 1015, S_m enters the cycle of length 54 whose terms are shown here.

Table of values

List of values

n	a(n)
1	5
2	9
3	13
4	35
5	57
6	79
7	101
8	105
9	505
10	509
11	909
12	913
13	323
14	327
15	727
16	731
17	141
18	145
19	545
20	549
21	949
22	953
23	363
24	367
25	767
26	771
27	181
28	185
29	585
30	589
31	989
32	993
33	403
34	308
35	807
36	712
37	221
38	126
39	625
40	530
41	39
42	97
43	83
44	42
45	28
46	86
47	72
48	31
49	17
50	75
51	61
52	20
53	6
54	10
55	5
56	9
57	13
58	35
59	57
60	79
61	101
62	105
63	505
64	509
65	909
66	913
67	323
68	327
69	727
70	731
71	141
72	145

n	a(n)
1	5
2	9
3	13
4	35
5	57
6	79
7	101
8	105
9	505
10	509
11	909
12	913
13	323
14	327
15	727
16	731
17	141
18	145
19	545
20	549
21	949
22	953
23	363
24	367
25	767
26	771
27	181
28	185
29	585
30	589
31	989
32	993
33	403
34	308
35	807
36	712
37	221
38	126
39	625
40	530
41	39
42	97
43	83
44	42
45	28
46	86
47	72
48	31
49	17
50	75
51	61
52	20
53	6
54	10
55	5
56	9
57	13
58	35
59	57
60	79
61	101
62	105
63	505
64	509
65	909
66	913
67	323
68	327
69	727
70	731
71	141
72	145

n	a(n)
1	5
2	9
3	13
4	35
5	57
6	79
7	101
8	105
9	505
10	509
11	909
12	913
13	323
14	327
15	727
16	731
17	141
18	145
19	545
20	549
21	949
22	953
23	363
24	367
25	767
26	771
27	181
28	185
29	585
30	589
31	989
32	993
33	403
34	308
35	807
36	712
37	221
38	126
39	625
40	530
41	39
42	97
43	83
44	42
45	28
46	86
47	72
48	31
49	17
50	75
51	61
52	20
53	6
54	10
55	5
56	9
57	13
58	35
59	57
60	79
61	101
62	105
63	505
64	509
65	909
66	913
67	323
68	327
69	727
70	731
71	141
72	145