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.

A200781 G.f.: 1/(1-5*x+10*x^3-5*x^4).

Table of values

n a(n)
0 1
1 5
2 25
3 115
4 530
5 2425
6 11100
7 50775
8 232275
9 1062500
10 4860250
11 22232375
12 101698250
13 465201250
14 2127983750
15 9734098125
16 44526969375
17 203681015625
18 931704015625
19 4261920875000
20 19495429065625
21 89178510250000
22 407931862578125
23 1866014626609375
24 8535765175875000
25 39045399804843750
26 178606512071015625
27 817004981729375000

List of values

[1, 5, 25, 115, 530, 2425, 11100, 50775, 232275, 1062500, 4860250, 22232375, 101698250, 465201250, 2127983750, 9734098125, 44526969375, 203681015625, 931704015625, 4261920875000, 19495429065625, 89178510250000, 407931862578125, 1866014626609375, 8535765175875000, 39045399804843750, 178606512071015625, 817004981729375000]

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

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