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.

A249984 Number of length 4+1 0..2*n arrays with the sum of the absolute values of adjacent differences equal to 4*n.

Table of values

n a(n)
1 64
2 384
3 1242
4 3030
5 6252
6 11524
7 19574
8 31242
9 47480
10 69352
11 98034
12 134814
13 181092
14 238380
15 308302
16 392594
17 493104
18 611792
19 750730
20 912102
21 1098204
22 1311444
23 1554342
24 1829530
25 2139752
26 2487864
27 2876834
28 3309742
29 3789780
30 4320252
31 4904574

List of values

[64, 384, 1242, 3030, 6252, 11524, 19574, 31242, 47480, 69352, 98034, 134814, 181092, 238380, 308302, 392594, 493104, 611792, 750730, 912102, 1098204, 1311444, 1554342, 1829530, 2139752, 2487864, 2876834, 3309742, 3789780, 4320252, 4904574]