A291545 - cp's OEIS frontend

A291545 a(n) is the smallest integer k > n such that (k+1)(k+2)...(2k-n)/(k(k-1)...(k-n+1)) is an integer.

n	a(n)
1	6
2	6
3	9
4	10
5	16
6	16
7	27
8	27
9	28
10	28
11	95
12	95
13	96
14	96
15	121
16	121
17	122
18	122
19	123
20	123
21	124
22	124
23	125
24	125
25	126
26	126
27	537
28	537
29	538
30	538
31	539
32	539
33	540
34	540
35	905
36	905
37	906
38	906
39	1149
40	1149
41	1150
42	1150
43	1349
44	1349
45	1350
46	1350
47	1351
48	1351
49	1352
50	1352

[6, 6, 9, 10, 16, 16, 27, 27, 28, 28, 95, 95, 96, 96, 121, 121, 122, 122, 123, 123, 124, 124, 125, 125, 126, 126, 537, 537, 538, 538, 539, 539, 540, 540, 905, 905, 906, 906, 1149, 1149, 1150, 1150, 1349, 1349, 1350, 1350, 1351, 1351, 1352, 1352]

cp's OEIS Frontend

A291545 a(n) is the smallest integer k > n such that (k+1)(k+2)...(2k-n)/(k(k-1)...(k-n+1)) is an integer.

Table of values

List of values