A212138 - cp's OEIS frontend

A212138 Triangular array: T(n,k) is the number of k-element subsets S of {1,...,n} whose average is in S.

n	a(n)
1	1
2	2
3	0
4	3
5	0
6	1
7	4
8	0
9	2
10	0
11	5
12	0
13	4
14	0
15	1
16	6
17	0
18	6
19	2
20	2
21	0
22	7
23	0
24	9
25	4
26	5
27	0
28	1
29	8
30	0
31	12
32	8
33	10
34	2
35	2
36	0
37	9
38	0
39	16
40	14
41	18
42	8
43	6
44	0
45	1
46	10
47	0
48	20
49	22
50	32
51	20
52	14
53	4
54	2
55	0
56	11
57	0
58	25
59	32
60	52
61	42
62	34
63	14
64	7
65	0
66	1
67	12
68	0
69	30
70	46
71	80
72	80
73	72
74	42
75	22
76	4
77	2
78	0
79	13
80	0
81	36
82	62
83	119
84	1

[1, 2, 0, 3, 0, 1, 4, 0, 2, 0, 5, 0, 4, 0, 1, 6, 0, 6, 2, 2, 0, 7, 0, 9, 4, 5, 0, 1, 8, 0, 12, 8, 10, 2, 2, 0, 9, 0, 16, 14, 18, 8, 6, 0, 1, 10, 0, 20, 22, 32, 20, 14, 4, 2, 0, 11, 0, 25, 32, 52, 42, 34, 14, 7, 0, 1, 12, 0, 30, 46, 80, 80, 72, 42, 22, 4, 2, 0, 13, 0, 36, 62, 119, 1]

cp's OEIS Frontend

A212138 Triangular array: T(n,k) is the number of k-element subsets S of {1,...,n} whose average is in S.

Table of values

List of values

n	a(n)
1	1
2	2
3	0
4	3
5	0
6	1
7	4
8	0
9	2
10	0
11	5
12	0
13	4
14	0
15	1
16	6
17	0
18	6
19	2
20	2
21	0
22	7
23	0
24	9
25	4
26	5
27	0
28	1
29	8
30	0
31	12
32	8
33	10
34	2
35	2
36	0
37	9
38	0
39	16
40	14
41	18
42	8
43	6
44	0
45	1
46	10
47	0
48	20
49	22
50	32
51	20
52	14
53	4
54	2
55	0
56	11
57	0
58	25
59	32
60	52
61	42
62	34
63	14
64	7
65	0
66	1
67	12
68	0
69	30
70	46
71	80
72	80
73	72
74	42
75	22
76	4
77	2
78	0
79	13
80	0
81	36
82	62
83	119
84	1

n	a(n)
1	1
2	2
3	0
4	3
5	0
6	1
7	4
8	0
9	2
10	0
11	5
12	0
13	4
14	0
15	1
16	6
17	0
18	6
19	2
20	2
21	0
22	7
23	0
24	9
25	4
26	5
27	0
28	1
29	8
30	0
31	12
32	8
33	10
34	2
35	2
36	0
37	9
38	0
39	16
40	14
41	18
42	8
43	6
44	0
45	1
46	10
47	0
48	20
49	22
50	32
51	20
52	14
53	4
54	2
55	0
56	11
57	0
58	25
59	32
60	52
61	42
62	34
63	14
64	7
65	0
66	1
67	12
68	0
69	30
70	46
71	80
72	80
73	72
74	42
75	22
76	4
77	2
78	0
79	13
80	0
81	36
82	62
83	119
84	1

n	a(n)
1	1
2	2
3	0
4	3
5	0
6	1
7	4
8	0
9	2
10	0
11	5
12	0
13	4
14	0
15	1
16	6
17	0
18	6
19	2
20	2
21	0
22	7
23	0
24	9
25	4
26	5
27	0
28	1
29	8
30	0
31	12
32	8
33	10
34	2
35	2
36	0
37	9
38	0
39	16
40	14
41	18
42	8
43	6
44	0
45	1
46	10
47	0
48	20
49	22
50	32
51	20
52	14
53	4
54	2
55	0
56	11
57	0
58	25
59	32
60	52
61	42
62	34
63	14
64	7
65	0
66	1
67	12
68	0
69	30
70	46
71	80
72	80
73	72
74	42
75	22
76	4
77	2
78	0
79	13
80	0
81	36
82	62
83	119
84	1