A266742 - cp's OEIS frontend

A266742 Irregular triangle read by rows: T(n,k) = floor(n/(prime(k)-1)), n>=1, 1 <= k <= pi(n+1), where pi is A000720.

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

[1, 2, 1, 3, 1, 4, 2, 1, 5, 2, 1, 6, 3, 1, 1, 7, 3, 1, 1, 8, 4, 2, 1, 9, 4, 2, 1, 10, 5, 2, 1, 1, 11, 5, 2, 1, 1, 12, 6, 3, 2, 1, 1, 13, 6, 3, 2, 1, 1, 14, 7, 3, 2, 1, 1, 15, 7, 3, 2, 1, 1, 16, 8, 4, 2, 1, 1, 1, 17, 8, 4, 2, 1, 1, 1, 18, 9, 4, 3, 1, 1, 1, 1]

cp's OEIS Frontend

A266742 Irregular triangle read by rows: T(n,k) = floor(n/(prime(k)-1)), n>=1, 1 <= k <= pi(n+1), where pi is A000720.

Table of values

List of values

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

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

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