A130517 - cp's OEIS frontend

A130517 Triangle read by rows: row n counts down from n in steps of 2, then counts up the remaining elements in the set {1,2,...,n}, again in steps of 2.

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

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

cp's OEIS Frontend

A130517 Triangle read by rows: row n counts down from n in steps of 2, then counts up the remaining elements in the set {1,2,...,n}, again in steps of 2.

Table of values

List of values

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

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

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