A117991 - cp's OEIS frontend

A117991 Number of distinct rational numbers that can be written as fractions of the first n composite numbers.

n	a(n)
1	1
2	3
3	7
4	11
5	19
6	23
7	35
8	41
9	53
10	59
11	67
12	77
13	101
14	109
15	131
16	161
17	179
18	197
19	205
20	227
21	247
22	289
23	317
24	333
25	381
26	407
27	431
28	445
29	473
30	495
31	555
32	575
33	629
34	657
35	693
36	729
37	751
38	801
39	835
40	877
41	957
42	975
43	1059
44	1097
45	1147
46	1209
47	1235
48	1283
49	1335
50	1367
51	1397
52	1499
53	1539

[1, 3, 7, 11, 19, 23, 35, 41, 53, 59, 67, 77, 101, 109, 131, 161, 179, 197, 205, 227, 247, 289, 317, 333, 381, 407, 431, 445, 473, 495, 555, 575, 629, 657, 693, 729, 751, 801, 835, 877, 957, 975, 1059, 1097, 1147, 1209, 1235, 1283, 1335, 1367, 1397, 1499, 1539]

cp's OEIS Frontend

A117991 Number of distinct rational numbers that can be written as fractions of the first n composite numbers.

Table of values

List of values