A037840 - cp's OEIS frontend

A037840 a(n)=Sum{|d(i)-d(i-1)|: i=1,...,m}, where Sum{d(i)*8^i: i=0,1,...,m} is the base 8 representation of n.

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

[0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 4, 5, 6, 2, 1, 0, 1, 2, 3, 4, 5, 3, 2, 1, 0, 1, 2, 3, 4, 4, 3, 2, 1, 0, 1, 2, 3, 5, 4, 3, 2, 1, 0, 1, 2, 6, 5, 4, 3, 2, 1, 0, 1, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 0, 1, 2, 3, 4, 5, 6, 3, 2, 1, 2, 3, 4, 5, 6, 5, 4, 3]

cp's OEIS Frontend

A037840 a(n)=Sum{|d(i)-d(i-1)|: i=1,...,m}, where Sum{d(i)*8^i: i=0,1,...,m} is the base 8 representation of n.

Table of values

List of values

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

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

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