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.

A333984 a(0) = 0; a(n) = 5^(n-1) + (1/n) * Sum_{k=1..n-1} binomial(n,k)^2 * 5^(k-1) * (n-k) * a(n-k).

Table of values

n a(n)
0 0
1 1
2 7
3 82
4 1839
5 69630
6 3950650
7 313747050
8 33224570175
9 4523562983350
10 769859662962750
11 160137417877796250
12 39971947204607486250
13 11791483690935887486250
14 4058152793413483423916250
15 1611522009185095020022068750
16 731368135285580087866788609375
17 376178084508304435598172207843750

List of values

[0, 1, 7, 82, 1839, 69630, 3950650, 313747050, 33224570175, 4523562983350, 769859662962750, 160137417877796250, 39971947204607486250, 11791483690935887486250, 4058152793413483423916250, 1611522009185095020022068750, 731368135285580087866788609375, 376178084508304435598172207843750]