A278109 - cp's OEIS frontend

A278109 Irregular triangle read by rows: T(n,k) = floor(n/prime(k)^2) for 1 <= prime(k)^2 <= n.

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

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

cp's OEIS Frontend

A278109 Irregular triangle read by rows: T(n,k) = floor(n/prime(k)^2) for 1 <= prime(k)^2 <= n.

Table of values

List of values

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

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

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