A172986 - cp's OEIS frontend

A172986 a(0) = 0, a(n) = A029826(n+1) for n <= 20, otherwise a(n) = a(n - 1 - n % 20) + A029826(2 + n % 20 ).

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

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

cp's OEIS Frontend

A172986 a(0) = 0, a(n) = A029826(n+1) for n <= 20, otherwise a(n) = a(n - 1 - n % 20) + A029826(2 + n % 20 ).

Table of values

List of values

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

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

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