A066057 - cp's OEIS frontend

A066057 'Reverse and Add' carried out in base 2 (cf. A062128); number of steps needed to reach a palindrome, or -1 if no palindrome is ever reached.

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	0
6	1
7	0
8	1
9	0
10	1
11	2
12	1
13	2
14	1
15	0
16	1
17	0
18	1
19	4
20	5
21	0
22	-1
23	2
24	1
25	4
26	-1
27	0
28	-1
29	2
30	1
31	0
32	1
33	0
34	1
35	-1
36	1
37	-1
38	1
39	2
40	1
41	-1
42	1
43	2
44	3
45	0
46	-1
47	-1
48	1
49	-1
50	3
51	0
52	1
53	2
54	3
55	2
56	1
57	2
58	3
59	2
60	-1
61	-1
62	1
63	0
64	1
65	0
66	1
67	-1
68	1
69	2
70	1
71	4
72	3
73	0
74	11
75	-1
76	5
77	-1
78	-1
79	2
80	1
81	2
82	1
83	4
84	-1
85	0
86	-1
87	2
88	5
89	-1
90	-1
91	2
92	3
93	0
94	-1
95	-1
96	1
97	-1
98	3
99	0
100	1
101	4
102	1
103	10
104	11
105	-1
106	-1
107	0
108	-1
109	2
110	-1
111	4

[0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, 4, 5, 0, -1, 2, 1, 4, -1, 0, -1, 2, 1, 0, 1, 0, 1, -1, 1, -1, 1, 2, 1, -1, 1, 2, 3, 0, -1, -1, 1, -1, 3, 0, 1, 2, 3, 2, 1, 2, 3, 2, -1, -1, 1, 0, 1, 0, 1, -1, 1, 2, 1, 4, 3, 0, 11, -1, 5, -1, -1, 2, 1, 2, 1, 4, -1, 0, -1, 2, 5, -1, -1, 2, 3, 0, -1, -1, 1, -1, 3, 0, 1, 4, 1, 10, 11, -1, -1, 0, -1, 2, -1, 4]

cp's OEIS Frontend

A066057 'Reverse and Add' carried out in base 2 (cf. A062128); number of steps needed to reach a palindrome, or -1 if no palindrome is ever reached.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	0
6	1
7	0
8	1
9	0
10	1
11	2
12	1
13	2
14	1
15	0
16	1
17	0
18	1
19	4
20	5
21	0
22	-1
23	2
24	1
25	4
26	-1
27	0
28	-1
29	2
30	1
31	0
32	1
33	0
34	1
35	-1
36	1
37	-1
38	1
39	2
40	1
41	-1
42	1
43	2
44	3
45	0
46	-1
47	-1
48	1
49	-1
50	3
51	0
52	1
53	2
54	3
55	2
56	1
57	2
58	3
59	2
60	-1
61	-1
62	1
63	0
64	1
65	0
66	1
67	-1
68	1
69	2
70	1
71	4
72	3
73	0
74	11
75	-1
76	5
77	-1
78	-1
79	2
80	1
81	2
82	1
83	4
84	-1
85	0
86	-1
87	2
88	5
89	-1
90	-1
91	2
92	3
93	0
94	-1
95	-1
96	1
97	-1
98	3
99	0
100	1
101	4
102	1
103	10
104	11
105	-1
106	-1
107	0
108	-1
109	2
110	-1
111	4

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	0
6	1
7	0
8	1
9	0
10	1
11	2
12	1
13	2
14	1
15	0
16	1
17	0
18	1
19	4
20	5
21	0
22	-1
23	2
24	1
25	4
26	-1
27	0
28	-1
29	2
30	1
31	0
32	1
33	0
34	1
35	-1
36	1
37	-1
38	1
39	2
40	1
41	-1
42	1
43	2
44	3
45	0
46	-1
47	-1
48	1
49	-1
50	3
51	0
52	1
53	2
54	3
55	2
56	1
57	2
58	3
59	2
60	-1
61	-1
62	1
63	0
64	1
65	0
66	1
67	-1
68	1
69	2
70	1
71	4
72	3
73	0
74	11
75	-1
76	5
77	-1
78	-1
79	2
80	1
81	2
82	1
83	4
84	-1
85	0
86	-1
87	2
88	5
89	-1
90	-1
91	2
92	3
93	0
94	-1
95	-1
96	1
97	-1
98	3
99	0
100	1
101	4
102	1
103	10
104	11
105	-1
106	-1
107	0
108	-1
109	2
110	-1
111	4

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	0
6	1
7	0
8	1
9	0
10	1
11	2
12	1
13	2
14	1
15	0
16	1
17	0
18	1
19	4
20	5
21	0
22	-1
23	2
24	1
25	4
26	-1
27	0
28	-1
29	2
30	1
31	0
32	1
33	0
34	1
35	-1
36	1
37	-1
38	1
39	2
40	1
41	-1
42	1
43	2
44	3
45	0
46	-1
47	-1
48	1
49	-1
50	3
51	0
52	1
53	2
54	3
55	2
56	1
57	2
58	3
59	2
60	-1
61	-1
62	1
63	0
64	1
65	0
66	1
67	-1
68	1
69	2
70	1
71	4
72	3
73	0
74	11
75	-1
76	5
77	-1
78	-1
79	2
80	1
81	2
82	1
83	4
84	-1
85	0
86	-1
87	2
88	5
89	-1
90	-1
91	2
92	3
93	0
94	-1
95	-1
96	1
97	-1
98	3
99	0
100	1
101	4
102	1
103	10
104	11
105	-1
106	-1
107	0
108	-1
109	2
110	-1
111	4