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.

A271564 Number of 6's found in the first differences of a reduced residue system modulo a primorial p#.

Table of values

n a(n)
1 0
2 0
3 2
4 14
5 142
6 1690
7 26630
8 470630
9 10169950
10 280323050
11 8278462850
12 293920842950
13 11604850743850
14 481192519512250
15 21869408938627250
16 1124832660535333750
17 64590101883781223750
18 3837395864206055401250
19 250972362651045466681250
20 17415757437491856599406250
21 1243227958252662737649043750

List of values

[0, 0, 2, 14, 142, 1690, 26630, 470630, 10169950, 280323050, 8278462850, 293920842950, 11604850743850, 481192519512250, 21869408938627250, 1124832660535333750, 64590101883781223750, 3837395864206055401250, 250972362651045466681250, 17415757437491856599406250, 1243227958252662737649043750]

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

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