A375030 - cp's OEIS frontend

A375030 Irregular triangle T(n, k), n > 0, k = 1..A373797(n), read by rows; the n-th row corresponds to the lexicographically earliest sequence S of A373797(n) distinct integers in the range 1..n such that for any prime number p, any run of consecutive multiples of p in S has length exactly 2.

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

[1, 1, 1, 1, 2, 4, 1, 2, 4, 1, 2, 6, 3, 1, 2, 6, 3, 1, 2, 4, 3, 6, 8, 1, 2, 4, 3, 6, 8, 1, 2, 4, 3, 9, 5, 10, 8, 1, 2, 4, 3, 9, 5, 10, 8, 1, 2, 4, 3, 6, 8, 5, 10, 12, 9, 1, 2, 4, 3, 6, 8, 5, 10, 12, 9, 1, 2, 4, 3, 6, 10, 5, 7, 14, 12, 9, 1, 2, 4, 3, 6, 8, 5, 15, 12, 14, 7]

cp's OEIS Frontend

A375030 Irregular triangle T(n, k), n > 0, k = 1..A373797(n), read by rows; the n-th row corresponds to the lexicographically earliest sequence S of A373797(n) distinct integers in the range 1..n such that for any prime number p, any run of consecutive multiples of p in S has length exactly 2.

Table of values

List of values

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

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

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