cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A289664 Number of integers in the interval [2,A289661(n)] whose greatest prime factor is equal to the n-th popular prime A385503(n).

Table of values

n a(n)
1 1
2 1
3 8
4 10
5 67
6 140
7 344
8 563
9 947
10 1197
11 2846
12 7357
13 7621
14 7629
15 48357
16 161507
17 697875
18 2760913
19 8354317
20 9754751
21 20284680
22 21082412
23 43030537
24 96835105
25 318536223
26 534252383
27 672026918
28 873944930
29 1996949860
30 2720035791
31 3321772681
32 3662980704
33 3923186891
34 7241151976

List of values

[1, 1, 8, 10, 67, 140, 344, 563, 947, 1197, 2846, 7357, 7621, 7629, 48357, 161507, 697875, 2760913, 8354317, 9754751, 20284680, 21082412, 43030537, 96835105, 318536223, 534252383, 672026918, 873944930, 1996949860, 2720035791, 3321772681, 3662980704, 3923186891, 7241151976]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.