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.

A140047 Triangle, read by rows: T(n,k) = (1/2)*Sum_{j=0..2^n-1} j^k for k=0..n-1, n>=1; related to the Prouhet-Tarry-Escott problem.

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 14
6 70
7 8
8 60
9 620
10 7200
11 16
12 248
13 5208
14 123008
15 3098760
16 32
17 1008
18 42672
19 2032128
20 103223568
21 5461682688
22 64
23 4064
24 345440
25 33032192
26 3369214496
27 357969864704
28 39119789090720
29 128
30 16320
31 2779840
32 532684800
33 108880217152

List of values

[1, 2, 3, 4, 14, 70, 8, 60, 620, 7200, 16, 248, 5208, 123008, 3098760, 32, 1008, 42672, 2032128, 103223568, 5461682688, 64, 4064, 345440, 33032192, 3369214496, 357969864704, 39119789090720, 128, 16320, 2779840, 532684800, 108880217152]