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.

A048863 Number of nonprimes (1 and composites) in the reduced residue system of n-th primorial number (A002110).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 6
5 142
6 2518
7 49836
8 1012859
9 24211838
10 721500294
11 22627459401
12 844130935668
13 34729870646918
14 1491483322755274
15 69890000837179157
16 3692723747920861125
17 217158823263305180123
18 13182405032836651359192
19 879055475442725460400606

List of values

[1, 1, 1, 1, 6, 142, 2518, 49836, 1012859, 24211838, 721500294, 22627459401, 844130935668, 34729870646918, 1491483322755274, 69890000837179157, 3692723747920861125, 217158823263305180123, 13182405032836651359192, 879055475442725460400606]

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

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