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.

A271565 Number of 8'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 0
4 2
5 28
6 394
7 6812
8 128810
9 2918020
10 83120450
11 2524575200
12 91589444450
13 3682730287600
14 155231331960250
15 7156139793803000
16 372520258834974250
17 21613446896458917500
18 1296556574981939521250
19 85520460088068245240000
20 5980843188551617897761250
21 430093937447553491544932500

List of values

[0, 0, 0, 2, 28, 394, 6812, 128810, 2918020, 83120450, 2524575200, 91589444450, 3682730287600, 155231331960250, 7156139793803000, 372520258834974250, 21613446896458917500, 1296556574981939521250, 85520460088068245240000, 5980843188551617897761250, 430093937447553491544932500]

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

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