A321279 - cp's OEIS frontend

A321279 Number of z-trees with product A181821(n). Number of connected antichains of multisets with multiset density -1, of a multiset whose multiplicities are the prime indices of n.

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	1
7	3
8	1
9	1
10	2
11	2
12	2
13	4
14	2
15	2
16	1
17	2
18	3
19	4
20	4
21	2
22	4
23	3
24	4
25	4
26	3
27	4
28	6
29	4
30	6
31	2
32	1
33	4
34	6
35	4
36	9
37	6
38	5
39	3
40	9
41	2
42	8
43	4
44	9
45	8
46	7
47	4
48	8
49	4
50	12
51	6
52	12
53	5
54	16
55	8
56	17
57	5
58	7
59	2
60	19
61	6
62	10
63	10
64	1
65	6
66	13
67	2
68	16
69	7
70	16
71	6
72	27
73	4
74	7
75	16
76	20
77	8
78	15
79	4
80	22

[0, 1, 2, 1, 2, 1, 3, 1, 1, 2, 2, 2, 4, 2, 2, 1, 2, 3, 4, 4, 2, 4, 3, 4, 4, 3, 4, 6, 4, 6, 2, 1, 4, 6, 4, 9, 6, 5, 3, 9, 2, 8, 4, 9, 8, 7, 4, 8, 4, 12, 6, 12, 5, 16, 8, 17, 5, 7, 2, 19, 6, 10, 10, 1, 6, 13, 2, 16, 7, 16, 6, 27, 4, 7, 16, 20, 8, 15, 4, 22]

cp's OEIS Frontend

A321279 Number of z-trees with product A181821(n). Number of connected antichains of multisets with multiset density -1, of a multiset whose multiplicities are the prime indices of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	1
7	3
8	1
9	1
10	2
11	2
12	2
13	4
14	2
15	2
16	1
17	2
18	3
19	4
20	4
21	2
22	4
23	3
24	4
25	4
26	3
27	4
28	6
29	4
30	6
31	2
32	1
33	4
34	6
35	4
36	9
37	6
38	5
39	3
40	9
41	2
42	8
43	4
44	9
45	8
46	7
47	4
48	8
49	4
50	12
51	6
52	12
53	5
54	16
55	8
56	17
57	5
58	7
59	2
60	19
61	6
62	10
63	10
64	1
65	6
66	13
67	2
68	16
69	7
70	16
71	6
72	27
73	4
74	7
75	16
76	20
77	8
78	15
79	4
80	22

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	1
7	3
8	1
9	1
10	2
11	2
12	2
13	4
14	2
15	2
16	1
17	2
18	3
19	4
20	4
21	2
22	4
23	3
24	4
25	4
26	3
27	4
28	6
29	4
30	6
31	2
32	1
33	4
34	6
35	4
36	9
37	6
38	5
39	3
40	9
41	2
42	8
43	4
44	9
45	8
46	7
47	4
48	8
49	4
50	12
51	6
52	12
53	5
54	16
55	8
56	17
57	5
58	7
59	2
60	19
61	6
62	10
63	10
64	1
65	6
66	13
67	2
68	16
69	7
70	16
71	6
72	27
73	4
74	7
75	16
76	20
77	8
78	15
79	4
80	22

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	1
7	3
8	1
9	1
10	2
11	2
12	2
13	4
14	2
15	2
16	1
17	2
18	3
19	4
20	4
21	2
22	4
23	3
24	4
25	4
26	3
27	4
28	6
29	4
30	6
31	2
32	1
33	4
34	6
35	4
36	9
37	6
38	5
39	3
40	9
41	2
42	8
43	4
44	9
45	8
46	7
47	4
48	8
49	4
50	12
51	6
52	12
53	5
54	16
55	8
56	17
57	5
58	7
59	2
60	19
61	6
62	10
63	10
64	1
65	6
66	13
67	2
68	16
69	7
70	16
71	6
72	27
73	4
74	7
75	16
76	20
77	8
78	15
79	4
80	22