A037841 - cp's OEIS frontend

A037841 a(n)=Sum{|d(i)-d(i-1)|: i=1,...,m}, where Sum{d(i)*9^i: i=0,1,...,m} is the base 9 representation of n.

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

[0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 2, 1, 0, 1, 2, 3, 4, 5, 6, 3, 2, 1, 0, 1, 2, 3, 4, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 4, 3, 2, 1, 0, 1, 2, 3, 6, 5, 4, 3, 2, 1, 0, 1, 2, 7, 6, 5, 4, 3, 2, 1, 0, 1, 8, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1]

cp's OEIS Frontend

A037841 a(n)=Sum{|d(i)-d(i-1)|: i=1,...,m}, where Sum{d(i)*9^i: i=0,1,...,m} is the base 9 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	0
9	1
10	0
11	1
12	2
13	3
14	4
15	5
16	6
17	7
18	2
19	1
20	0
21	1
22	2
23	3
24	4
25	5
26	6
27	3
28	2
29	1
30	0
31	1
32	2
33	3
34	4
35	5
36	4
37	3
38	2
39	1
40	0
41	1
42	2
43	3
44	4
45	5
46	4
47	3
48	2
49	1
50	0
51	1
52	2
53	3
54	6
55	5
56	4
57	3
58	2
59	1
60	0
61	1
62	2
63	7
64	6
65	5
66	4
67	3
68	2
69	1
70	0
71	1
72	8
73	7
74	6
75	5
76	4
77	3
78	2
79	1
80	0
81	1
82	2
83	3
84	4
85	5
86	6
87	7
88	8
89	9
90	1

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

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