A257685 - cp's OEIS frontend

A257685 Left inverse for injection A255411: a(0) = 0, after which, if n = A255411(k) for some k, then a(n) = k, otherwise a(n) = 0.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	2
13	0
14	0
15	0
16	3
17	0
18	4
19	0
20	0
21	0
22	5
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	7
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	8
61	0
62	0
63	0
64	9
65	0
66	10
67	0
68	0
69	0
70	11
71	0
72	12
73	0
74	0
75	0
76	13
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	14
85	0
86	0
87	0
88	15
89	0
90	16
91	0
92	0
93	0
94	17
95	0
96	18
97	0
98	0
99	0
100	19
101	0
102	0
103	0
104	0
105	0
106	0
107	0
108	20
109	0
110	0
111	0
112	21
113	0
114	22
115	0
116	0
117	0
118	23
119	0
120	0

[0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 3, 0, 4, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 9, 0, 10, 0, 0, 0, 11, 0, 12, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 14, 0, 0, 0, 15, 0, 16, 0, 0, 0, 17, 0, 18, 0, 0, 0, 19, 0, 0, 0, 0, 0, 0, 0, 20, 0, 0, 0, 21, 0, 22, 0, 0, 0, 23, 0, 0]

cp's OEIS Frontend

A257685 Left inverse for injection A255411: a(0) = 0, after which, if n = A255411(k) for some k, then a(n) = k, otherwise a(n) = 0.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	2
13	0
14	0
15	0
16	3
17	0
18	4
19	0
20	0
21	0
22	5
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	7
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	8
61	0
62	0
63	0
64	9
65	0
66	10
67	0
68	0
69	0
70	11
71	0
72	12
73	0
74	0
75	0
76	13
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	14
85	0
86	0
87	0
88	15
89	0
90	16
91	0
92	0
93	0
94	17
95	0
96	18
97	0
98	0
99	0
100	19
101	0
102	0
103	0
104	0
105	0
106	0
107	0
108	20
109	0
110	0
111	0
112	21
113	0
114	22
115	0
116	0
117	0
118	23
119	0
120	0

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	2
13	0
14	0
15	0
16	3
17	0
18	4
19	0
20	0
21	0
22	5
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	7
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	8
61	0
62	0
63	0
64	9
65	0
66	10
67	0
68	0
69	0
70	11
71	0
72	12
73	0
74	0
75	0
76	13
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	14
85	0
86	0
87	0
88	15
89	0
90	16
91	0
92	0
93	0
94	17
95	0
96	18
97	0
98	0
99	0
100	19
101	0
102	0
103	0
104	0
105	0
106	0
107	0
108	20
109	0
110	0
111	0
112	21
113	0
114	22
115	0
116	0
117	0
118	23
119	0
120	0

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	2
13	0
14	0
15	0
16	3
17	0
18	4
19	0
20	0
21	0
22	5
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0
31	0
32	0
33	0
34	0
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	7
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	8
61	0
62	0
63	0
64	9
65	0
66	10
67	0
68	0
69	0
70	11
71	0
72	12
73	0
74	0
75	0
76	13
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	14
85	0
86	0
87	0
88	15
89	0
90	16
91	0
92	0
93	0
94	17
95	0
96	18
97	0
98	0
99	0
100	19
101	0
102	0
103	0
104	0
105	0
106	0
107	0
108	20
109	0
110	0
111	0
112	21
113	0
114	22
115	0
116	0
117	0
118	23
119	0
120	0