A019491 - cp's OEIS frontend

A019491 Numbers n for which number of distinct prime divisors of binomial(n,k) has local minimum at k = n/2.

n	a(n)
1	10
2	20
3	27
4	28
5	29
6	34
7	38
8	44
9	45
10	46
11	51
12	52
13	53
14	54
15	60
16	61
17	62
18	69
19	70
20	74
21	77
22	78
23	79
24	81
25	82
26	87
27	88
28	92
29	93
30	94
31	95
32	101
33	102
34	103
35	104
36	105
37	106
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	118
47	120
48	122
49	124
50	125
51	126
52	127
53	130
54	138
55	139
56	140

[10, 20, 27, 28, 29, 34, 38, 44, 45, 46, 51, 52, 53, 54, 60, 61, 62, 69, 70, 74, 77, 78, 79, 81, 82, 87, 88, 92, 93, 94, 95, 101, 102, 103, 104, 105, 106, 110, 111, 112, 113, 114, 115, 116, 117, 118, 120, 122, 124, 125, 126, 127, 130, 138, 139, 140]

cp's OEIS Frontend

A019491 Numbers n for which number of distinct prime divisors of binomial(n,k) has local minimum at k = n/2.

Table of values

List of values

n	a(n)
1	10
2	20
3	27
4	28
5	29
6	34
7	38
8	44
9	45
10	46
11	51
12	52
13	53
14	54
15	60
16	61
17	62
18	69
19	70
20	74
21	77
22	78
23	79
24	81
25	82
26	87
27	88
28	92
29	93
30	94
31	95
32	101
33	102
34	103
35	104
36	105
37	106
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	118
47	120
48	122
49	124
50	125
51	126
52	127
53	130
54	138
55	139
56	140

n	a(n)
1	10
2	20
3	27
4	28
5	29
6	34
7	38
8	44
9	45
10	46
11	51
12	52
13	53
14	54
15	60
16	61
17	62
18	69
19	70
20	74
21	77
22	78
23	79
24	81
25	82
26	87
27	88
28	92
29	93
30	94
31	95
32	101
33	102
34	103
35	104
36	105
37	106
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	118
47	120
48	122
49	124
50	125
51	126
52	127
53	130
54	138
55	139
56	140

n	a(n)
1	10
2	20
3	27
4	28
5	29
6	34
7	38
8	44
9	45
10	46
11	51
12	52
13	53
14	54
15	60
16	61
17	62
18	69
19	70
20	74
21	77
22	78
23	79
24	81
25	82
26	87
27	88
28	92
29	93
30	94
31	95
32	101
33	102
34	103
35	104
36	105
37	106
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	118
47	120
48	122
49	124
50	125
51	126
52	127
53	130
54	138
55	139
56	140