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.

A203856 a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^5, where Lucas(n) = A000204(n).

Table of values

n a(n)
1 1
2 121
3 341
4 4141
5 32210
6 314717
7 2930164
8 28666025
9 281724928
10 2815289555
11 28370872818
12 288468152625
13 2952876368200
14 30409537607218
15 314760765272250
16 3272590619892675
17 34158620991538050
18 357779277130203136
19 3758998894159780092
20 39603542856374168550

List of values

[1, 121, 341, 4141, 32210, 314717, 2930164, 28666025, 281724928, 2815289555, 28370872818, 288468152625, 2952876368200, 30409537607218, 314760765272250, 3272590619892675, 34158620991538050, 357779277130203136, 3758998894159780092, 39603542856374168550]

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

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