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.

A212783 Half the number of 0..n arrays of length 4 with second differences nonzero.

Table of values

n a(n)
1 5
2 27
3 99
4 252
5 546
6 1034
7 1803
8 2925
9 4517
10 6670
11 9528
12 13204
13 17869
14 23655
15 30763
16 39344
17 49626
18 61782
19 76067
20 92673
21 111885
22 133914
23 159072
24 187592
25 219813
26 255987
27 296483
28 341572
29 391650
30 447010
31 508075
32 575157
33 648709
34 729062
35 816696
36 911964

List of values

[5, 27, 99, 252, 546, 1034, 1803, 2925, 4517, 6670, 9528, 13204, 17869, 23655, 30763, 39344, 49626, 61782, 76067, 92673, 111885, 133914, 159072, 187592, 219813, 255987, 296483, 341572, 391650, 447010, 508075, 575157, 648709, 729062, 816696, 911964]