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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.

A203857 a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^6, where Lucas(n) = A000204(n).

Table of values

n a(n)
1 1
2 364
3 1365
4 29230
5 354312
6 5667900
7 84974760
8 1347387210
9 21411102720
10 346282421940
11 5645803690800
12 92886793449030
13 1538448587832240
14 25635241395476100
15 429333683845968552
16 7222607529064709670
17 121980435560782376760
18 2067248664062116147200

List of values

[1, 364, 1365, 29230, 354312, 5667900, 84974760, 1347387210, 21411102720, 346282421940, 5645803690800, 92886793449030, 1538448587832240, 25635241395476100, 429333683845968552, 7222607529064709670, 121980435560782376760, 2067248664062116147200]

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

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