A055017 - cp's OEIS frontend

A055017 Difference between sums of alternate digits of n starting with the last, i.e., (sum of ultimate digit of n, antepenultimate digit of n, ...) - (sum of penultimate digit of n, preantepenultimate digit of n, ...).

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

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

cp's OEIS Frontend

A055017 Difference between sums of alternate digits of n starting with the last, i.e., (sum of ultimate digit of n, antepenultimate digit of n, ...) - (sum of penultimate digit of n, preantepenultimate digit of n, ...).

Table of values

List of values

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

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

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