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.

A231809 Denominator of asymptotic density of Union{H_p: p is odd prime and p <= n-th prime}, where H_p is {K*p*(p-1)/2 : K integer}.

Table of values

n a(n)
1 1
2 3
3 5
4 5
5 165
6 165
7 561
8 561
9 12903
10 170085
11 170085
12 170085
13 170085
14 170085
15 55957965
16 141368472245
17 25022219587365
18 25022219587365
19 25022219587365
20 1776577590702915
21 1776577590702915
22 1776577590702915
23 287890168626762845
24 4749253940274679
25 4749253940274679

List of values

[1, 3, 5, 5, 165, 165, 561, 561, 12903, 170085, 170085, 170085, 170085, 170085, 55957965, 141368472245, 25022219587365, 25022219587365, 25022219587365, 1776577590702915, 1776577590702915, 1776577590702915, 287890168626762845, 4749253940274679, 4749253940274679]