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.

A113132 a(0) = a(1) = 1, a(2) = x, a(3) = 2x^2, a(n) = x*(n-1)*a(n-1) + Sum_{j=2..n-2} (j-1)*a(j)*a(n-j), n>=4 and for x = 5.

Table of values

n a(n)
0 1
1 1
2 5
3 50
4 775
5 16250
6 426750
7 13402500
8 488566875
9 20249281250
10 939823431250
11 48278138937500
12 2719288331093750
13 166652371531562500
14 11040797013538437500
15 786338134640203125000
16 59916445436152444921875

List of values

[1, 1, 5, 50, 775, 16250, 426750, 13402500, 488566875, 20249281250, 939823431250, 48278138937500, 2719288331093750, 166652371531562500, 11040797013538437500, 786338134640203125000, 59916445436152444921875]