A212139 - cp's OEIS frontend

A212139 Triangular array: T(n,k) is the number of k-element subsets of {1,...,n} that satisfy mean=median.

n	a(n)
1	1
2	2
3	1
4	3
5	3
6	1
7	4
8	6
9	2
10	1
11	5
12	10
13	4
14	3
15	1
16	6
17	15
18	6
19	7
20	2
21	1
22	7
23	21
24	9
25	13
26	5
27	3
28	1
29	8
30	28
31	12
32	22
33	10
34	8
35	2
36	1
37	9
38	36
39	16
40	34
41	18
42	18
43	6
44	3
45	1
46	10
47	45
48	20
49	50
50	30
51	36
52	14
53	9
54	2
55	1
56	11
57	55
58	25
59	70
60	48
61	66
62	32
63	23
64	7
65	3
66	1
67	12
68	66
69	30
70	95
71	72
72	114
73	64
74	55
75	20
76	10
77	2
78	1

[1, 2, 1, 3, 3, 1, 4, 6, 2, 1, 5, 10, 4, 3, 1, 6, 15, 6, 7, 2, 1, 7, 21, 9, 13, 5, 3, 1, 8, 28, 12, 22, 10, 8, 2, 1, 9, 36, 16, 34, 18, 18, 6, 3, 1, 10, 45, 20, 50, 30, 36, 14, 9, 2, 1, 11, 55, 25, 70, 48, 66, 32, 23, 7, 3, 1, 12, 66, 30, 95, 72, 114, 64, 55, 20, 10, 2, 1]

cp's OEIS Frontend

A212139 Triangular array: T(n,k) is the number of k-element subsets of {1,...,n} that satisfy mean=median.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	3
5	3
6	1
7	4
8	6
9	2
10	1
11	5
12	10
13	4
14	3
15	1
16	6
17	15
18	6
19	7
20	2
21	1
22	7
23	21
24	9
25	13
26	5
27	3
28	1
29	8
30	28
31	12
32	22
33	10
34	8
35	2
36	1
37	9
38	36
39	16
40	34
41	18
42	18
43	6
44	3
45	1
46	10
47	45
48	20
49	50
50	30
51	36
52	14
53	9
54	2
55	1
56	11
57	55
58	25
59	70
60	48
61	66
62	32
63	23
64	7
65	3
66	1
67	12
68	66
69	30
70	95
71	72
72	114
73	64
74	55
75	20
76	10
77	2
78	1

n	a(n)
1	1
2	2
3	1
4	3
5	3
6	1
7	4
8	6
9	2
10	1
11	5
12	10
13	4
14	3
15	1
16	6
17	15
18	6
19	7
20	2
21	1
22	7
23	21
24	9
25	13
26	5
27	3
28	1
29	8
30	28
31	12
32	22
33	10
34	8
35	2
36	1
37	9
38	36
39	16
40	34
41	18
42	18
43	6
44	3
45	1
46	10
47	45
48	20
49	50
50	30
51	36
52	14
53	9
54	2
55	1
56	11
57	55
58	25
59	70
60	48
61	66
62	32
63	23
64	7
65	3
66	1
67	12
68	66
69	30
70	95
71	72
72	114
73	64
74	55
75	20
76	10
77	2
78	1

n	a(n)
1	1
2	2
3	1
4	3
5	3
6	1
7	4
8	6
9	2
10	1
11	5
12	10
13	4
14	3
15	1
16	6
17	15
18	6
19	7
20	2
21	1
22	7
23	21
24	9
25	13
26	5
27	3
28	1
29	8
30	28
31	12
32	22
33	10
34	8
35	2
36	1
37	9
38	36
39	16
40	34
41	18
42	18
43	6
44	3
45	1
46	10
47	45
48	20
49	50
50	30
51	36
52	14
53	9
54	2
55	1
56	11
57	55
58	25
59	70
60	48
61	66
62	32
63	23
64	7
65	3
66	1
67	12
68	66
69	30
70	95
71	72
72	114
73	64
74	55
75	20
76	10
77	2
78	1