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.

A228330 Let h(m) denote the sequence whose n-th term is Sum_{k=0..n} (k+1)^m*T(n,k)^2, where T(n,k) is the Catalan triangle A039598. This is h(4).

Table of values

n a(n)
0 1
1 20
2 362
3 6504
4 114686
5 1992536
6 34231540
7 583027920
8 9862508790
9 165918037560
10 2778642667020
11 46358257249200
12 770951008563372
13 12785838603285104
14 211540243555702376
15 3492587812271418784
16 57557091526140668070
17 946970607665938615032
18 15557339429900195819164
19 255246113991506558429936

List of values

[1, 20, 362, 6504, 114686, 1992536, 34231540, 583027920, 9862508790, 165918037560, 2778642667020, 46358257249200, 770951008563372, 12785838603285104, 211540243555702376, 3492587812271418784, 57557091526140668070, 946970607665938615032, 15557339429900195819164, 255246113991506558429936]