A004074 - cp's OEIS frontend

A004074 a(n) = 2*A004001(n) - n, where A004001 is the Hofstadter-Conway $10000 sequence.

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

[1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 3, 2, 3, 2, 1, 0, 1, 2, 3, 4, 3, 4, 5, 4, 5, 4, 3, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 4, 5, 6, 7, 6, 7, 8, 7, 8, 7, 6, 7, 8, 7, 8, 7, 6, 7, 6, 5, 4, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 5, 6, 7, 8, 9, 8, 9, 10, 11, 10, 11, 12, 11, 12, 11, 10, 11, 12, 13, 12, 13, 14, 13, 14, 13, 12]

cp's OEIS Frontend

A004074 a(n) = 2*A004001(n) - n, where A004001 is the Hofstadter-Conway $10000 sequence.

Table of values

List of values

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

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

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