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.

A200456 Number of -n..n arrays x(0..3) of 4 elements with zero sum and nonzero first and second differences.

Table of values

n a(n)
1 4
2 44
3 142
4 342
5 678
6 1148
7 1832
8 2744
9 3874
10 5334
11 7114
12 9192
13 11708
14 14644
15 17962
16 21826
17 26206
18 31044
19 36544
20 42660
21 49310
22 56734
23 64866
24 73616
25 83256
26 93696
27 104834
28 116970
29 130006
30 143824
31 158748
32 174668
33 191446
34 209446
35 228542
36 248572

List of values

[4, 44, 142, 342, 678, 1148, 1832, 2744, 3874, 5334, 7114, 9192, 11708, 14644, 17962, 21826, 26206, 31044, 36544, 42660, 49310, 56734, 64866, 73616, 83256, 93696, 104834, 116970, 130006, 143824, 158748, 174668, 191446, 209446, 228542, 248572]