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.

A180790 Number of distinct solutions of sum{i=1..8}(x(2i-1)*x(2i)) = 1 (mod n), with x() only in 1..n-1.

Table of values

n a(n)
1 0
2 0
3 12
4 318
5 4868
6 53133
7 444019
8 2935676
9 16112283
10 75118525
11 307372602
12 1118328968
13 3701885454
14 11222027568
15 31699803817
16 83633494240
17 209004408969
18 494557127475
19 1121475446283
20 2431614016920
21 5096216430113
22 10285962253471

List of values

[0, 0, 12, 318, 4868, 53133, 444019, 2935676, 16112283, 75118525, 307372602, 1118328968, 3701885454, 11222027568, 31699803817, 83633494240, 209004408969, 494557127475, 1121475446283, 2431614016920, 5096216430113, 10285962253471]

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

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