A289171 - cp's OEIS frontend

A289171 Irregular triangle T(n, k) read by rows with 1 <= k <= n: T(n, 1) = A020900(n - k + 1) - (n - k + 1) and T(n, k) = max(0, T(n - 1, k - 1) - 1) otherwise.

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

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

cp's OEIS Frontend

A289171 Irregular triangle T(n, k) read by rows with 1 <= k <= n: T(n, 1) = A020900(n - k + 1) - (n - k + 1) and T(n, k) = max(0, T(n - 1, k - 1) - 1) otherwise.

Table of values

List of values

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

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

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