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.

A343527 Number of ordered quadruples (w, x, y, z) with gcd(w, x, y, z) = 1 and 1 <= {w, x, y, z} <= 2^n.

Table of values

n a(n)
0 1
1 15
2 239
3 3823
4 60735
5 972191
6 15517679
7 248252879
8 3969108895
9 63506982943
10 1015951568815
11 16255093526239
12 260068569617727
13 4161109496115135
14 66577084386669199
15 1065232436999055375
16 17043668344393625999
17 272698739815301095247
18 4363176901343767529551
19 69810828455823683068415
20 1116973047989955380768527

List of values

[1, 15, 239, 3823, 60735, 972191, 15517679, 248252879, 3969108895, 63506982943, 1015951568815, 16255093526239, 260068569617727, 4161109496115135, 66577084386669199, 1065232436999055375, 17043668344393625999, 272698739815301095247, 4363176901343767529551, 69810828455823683068415, 1116973047989955380768527]

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

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