A157522 - cp's OEIS frontend

A157522 Triangle T(n, k) = f(n, k) + f(n, n-k) - 1, where f(n, k) = k if k <= floor(n/4), floor(n/2) - k if floor(n/4) < k <= floor(n/2), k - floor(n/2) if floor(n/2) < k <= floor(3*n/4), otherwise n-k, read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	1
13	3
14	1
15	1
16	3
17	2
18	2
19	3
20	1
21	1
22	3
23	3
24	1
25	3
26	3
27	1
28	1
29	3
30	4
31	2
32	2
33	4
34	3
35	1
36	1
37	3
38	5
39	3
40	1
41	3
42	5
43	3
44	1
45	1
46	3
47	5
48	4
49	2
50	2
51	4
52	5
53	3
54	1
55	1
56	3
57	5
58	5
59	3
60	1
61	3
62	5
63	5
64	3
65	1
66	1
67	3
68	5
69	6
70	4
71	2
72	2
73	4
74	6
75	5
76	3
77	1
78	1
79	3
80	5
81	7
82	5
83	3
84	1
85	3
86	5
87	7
88	5
89	3
90	1
91	1
92	3
93	5
94	7
95	6
96	4
97	2
98	2
99	4
100	6
101	7
102	5
103	3
104	1

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

cp's OEIS Frontend

A157522 Triangle T(n, k) = f(n, k) + f(n, n-k) - 1, where f(n, k) = k if k <= floor(n/4), floor(n/2) - k if floor(n/4) < k <= floor(n/2), k - floor(n/2) if floor(n/2) < k <= floor(3*n/4), otherwise n-k, read by rows.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	1
13	3
14	1
15	1
16	3
17	2
18	2
19	3
20	1
21	1
22	3
23	3
24	1
25	3
26	3
27	1
28	1
29	3
30	4
31	2
32	2
33	4
34	3
35	1
36	1
37	3
38	5
39	3
40	1
41	3
42	5
43	3
44	1
45	1
46	3
47	5
48	4
49	2
50	2
51	4
52	5
53	3
54	1
55	1
56	3
57	5
58	5
59	3
60	1
61	3
62	5
63	5
64	3
65	1
66	1
67	3
68	5
69	6
70	4
71	2
72	2
73	4
74	6
75	5
76	3
77	1
78	1
79	3
80	5
81	7
82	5
83	3
84	1
85	3
86	5
87	7
88	5
89	3
90	1
91	1
92	3
93	5
94	7
95	6
96	4
97	2
98	2
99	4
100	6
101	7
102	5
103	3
104	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	1
13	3
14	1
15	1
16	3
17	2
18	2
19	3
20	1
21	1
22	3
23	3
24	1
25	3
26	3
27	1
28	1
29	3
30	4
31	2
32	2
33	4
34	3
35	1
36	1
37	3
38	5
39	3
40	1
41	3
42	5
43	3
44	1
45	1
46	3
47	5
48	4
49	2
50	2
51	4
52	5
53	3
54	1
55	1
56	3
57	5
58	5
59	3
60	1
61	3
62	5
63	5
64	3
65	1
66	1
67	3
68	5
69	6
70	4
71	2
72	2
73	4
74	6
75	5
76	3
77	1
78	1
79	3
80	5
81	7
82	5
83	3
84	1
85	3
86	5
87	7
88	5
89	3
90	1
91	1
92	3
93	5
94	7
95	6
96	4
97	2
98	2
99	4
100	6
101	7
102	5
103	3
104	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	1
11	3
12	1
13	3
14	1
15	1
16	3
17	2
18	2
19	3
20	1
21	1
22	3
23	3
24	1
25	3
26	3
27	1
28	1
29	3
30	4
31	2
32	2
33	4
34	3
35	1
36	1
37	3
38	5
39	3
40	1
41	3
42	5
43	3
44	1
45	1
46	3
47	5
48	4
49	2
50	2
51	4
52	5
53	3
54	1
55	1
56	3
57	5
58	5
59	3
60	1
61	3
62	5
63	5
64	3
65	1
66	1
67	3
68	5
69	6
70	4
71	2
72	2
73	4
74	6
75	5
76	3
77	1
78	1
79	3
80	5
81	7
82	5
83	3
84	1
85	3
86	5
87	7
88	5
89	3
90	1
91	1
92	3
93	5
94	7
95	6
96	4
97	2
98	2
99	4
100	6
101	7
102	5
103	3
104	1