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.

A181471 a(n) = number of numbers of the form k^2-1 having n-th prime as largest prime divisor.

Table of values

n a(n)
1 1
2 4
3 8
4 16
5 20
6 34
7 47
8 72
9 95
10 126
11 168
12 208
13 262
14 343
15 433
16 507
17 634
18 799
19 976
20 1146
21 1439
22 1698
23 2082
24 2371
25 2734

List of values

[1, 4, 8, 16, 20, 34, 47, 72, 95, 126, 168, 208, 262, 343, 433, 507, 634, 799, 976, 1146, 1439, 1698, 2082, 2371, 2734]