A228651 - cp's OEIS frontend

A228651 Numbers m such that if an urn contains m balls, with at least one each of c colors, for some c > 1 there exists a combination of c colors such that it is equally probable for c balls randomly selected from the urn to all be either the same color or distinct colors.

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

[4, 6, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76]

cp's OEIS Frontend

A228651 Numbers m such that if an urn contains m balls, with at least one each of c colors, for some c > 1 there exists a combination of c colors such that it is equally probable for c balls randomly selected from the urn to all be either the same color or distinct colors.

Table of values

List of values

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

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

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