A089818 - cp's OEIS frontend

A089818 T(n,k) = number of subsets of {1,..., n} containing exactly k primes, triangle read by rows, 0<=k

n	a(n)
1	2
2	2
3	2
4	2
5	4
6	2
7	4
8	8
9	4
10	0
11	4
12	12
13	12
14	4
15	0
16	8
17	24
18	24
19	8
20	0
21	0
22	8
23	32
24	48
25	32
26	8
27	0
28	0
29	16
30	64
31	96
32	64
33	16
34	0
35	0
36	0
37	32
38	128
39	192
40	128
41	32
42	0
43	0
44	0
45	0
46	64
47	256
48	384
49	256
50	64
51	0
52	0
53	0
54	0
55	0
56	64
57	320
58	640
59	640
60	320
61	64
62	0
63	0
64	0
65	0
66	0
67	128
68	640
69	1280
70	1280
71	640
72	128
73	0
74	0
75	0
76	0
77	0

[2, 2, 2, 2, 4, 2, 4, 8, 4, 0, 4, 12, 12, 4, 0, 8, 24, 24, 8, 0, 0, 8, 32, 48, 32, 8, 0, 0, 16, 64, 96, 64, 16, 0, 0, 0, 32, 128, 192, 128, 32, 0, 0, 0, 0, 64, 256, 384, 256, 64, 0, 0, 0, 0, 0, 64, 320, 640, 640, 320, 64, 0, 0, 0, 0, 0, 128, 640, 1280, 1280, 640, 128, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A089818 T(n,k) = number of subsets of {1,..., n} containing exactly k primes, triangle read by rows, 0<=k

Table of values

List of values