A352245 - cp's OEIS frontend

A352245 a(0) = 1; for n >= 1, a(n) = the decimal value of the binary number of the index of where n first appears in the concatenation of all previous binary terms. If the binary value of n has not previously appeared then a(n) = 0.

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	0
10	2
11	0
12	0
13	1
14	0
15	0
16	0
17	8
18	0
19	0
20	6
21	2
22	0
23	0
24	0
25	0
26	1
27	0
28	0
29	0
30	0
31	0
32	20
33	0
34	8
35	0
36	0
37	0
38	0
39	0
40	6
41	0
42	2
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	56
51	0
52	26
53	1
54	0
55	0
56	69
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	47
65	20
66	0
67	71
68	8
69	84
70	0
71	110
72	57
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	27
81	6
82	79
83	155
84	4
85	2
86	0
87	0
88	0
89	0
90	0
91	0
92	134

[1, 1, 0, 1, 0, 2, 1, 0, 0, 0, 2, 0, 0, 1, 0, 0, 0, 8, 0, 0, 6, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 20, 0, 8, 0, 0, 0, 0, 0, 6, 0, 2, 0, 0, 0, 0, 0, 0, 0, 56, 0, 26, 1, 0, 0, 69, 0, 0, 0, 0, 0, 0, 0, 47, 20, 0, 71, 8, 84, 0, 110, 57, 0, 0, 0, 0, 0, 0, 0, 27, 6, 79, 155, 4, 2, 0, 0, 0, 0, 0, 0, 134]

cp's OEIS Frontend

A352245 a(0) = 1; for n >= 1, a(n) = the decimal value of the binary number of the index of where n first appears in the concatenation of all previous binary terms. If the binary value of n has not previously appeared then a(n) = 0.

Table of values

List of values

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	0
10	2
11	0
12	0
13	1
14	0
15	0
16	0
17	8
18	0
19	0
20	6
21	2
22	0
23	0
24	0
25	0
26	1
27	0
28	0
29	0
30	0
31	0
32	20
33	0
34	8
35	0
36	0
37	0
38	0
39	0
40	6
41	0
42	2
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	56
51	0
52	26
53	1
54	0
55	0
56	69
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	47
65	20
66	0
67	71
68	8
69	84
70	0
71	110
72	57
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	27
81	6
82	79
83	155
84	4
85	2
86	0
87	0
88	0
89	0
90	0
91	0
92	134

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	0
10	2
11	0
12	0
13	1
14	0
15	0
16	0
17	8
18	0
19	0
20	6
21	2
22	0
23	0
24	0
25	0
26	1
27	0
28	0
29	0
30	0
31	0
32	20
33	0
34	8
35	0
36	0
37	0
38	0
39	0
40	6
41	0
42	2
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	56
51	0
52	26
53	1
54	0
55	0
56	69
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	47
65	20
66	0
67	71
68	8
69	84
70	0
71	110
72	57
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	27
81	6
82	79
83	155
84	4
85	2
86	0
87	0
88	0
89	0
90	0
91	0
92	134

n	a(n)
0	1
1	1
2	0
3	1
4	0
5	2
6	1
7	0
8	0
9	0
10	2
11	0
12	0
13	1
14	0
15	0
16	0
17	8
18	0
19	0
20	6
21	2
22	0
23	0
24	0
25	0
26	1
27	0
28	0
29	0
30	0
31	0
32	20
33	0
34	8
35	0
36	0
37	0
38	0
39	0
40	6
41	0
42	2
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	56
51	0
52	26
53	1
54	0
55	0
56	69
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	47
65	20
66	0
67	71
68	8
69	84
70	0
71	110
72	57
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	27
81	6
82	79
83	155
84	4
85	2
86	0
87	0
88	0
89	0
90	0
91	0
92	134