A077553 - cp's OEIS frontend

A077553 Triangle in which the n-th row contains n distinct composite numbers with the least product and has least number of prime divisors. No member of a row is a multiple of another member of the row.

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

[4, 4, 6, 4, 6, 9, 4, 6, 9, 10, 4, 6, 9, 10, 15, 4, 6, 9, 10, 15, 25, 4, 6, 9, 10, 14, 15, 21, 4, 6, 9, 10, 14, 15, 21, 25, 4, 6, 9, 10, 14, 15, 21, 25, 35, 4, 6, 9, 10, 14, 15, 21, 25, 35, 49, 4, 6, 9, 10, 14, 15, 21, 22, 25, 33, 35, 4, 6, 9, 10, 14, 15, 21, 22, 25, 33, 35, 49, 4, 6, 9, 10]

cp's OEIS Frontend

A077553 Triangle in which the n-th row contains n distinct composite numbers with the least product and has least number of prime divisors. No member of a row is a multiple of another member of the row.

Table of values

List of values

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

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

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