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.

A212572 Number of (w,x,y,z) with all terms in {1,...,n} and |w-x| <= |x-y| + |y-z|.

Table of values

n a(n)
0 0
1 1
2 14
3 71
4 220
5 533
6 1094
7 2015
8 3416
9 5449
10 8270
11 12071
12 17044
13 23421
14 31430
15 41343
16 53424
17 67985
18 85326
19 105799
20 129740
21 157541
22 189574
23 226271
24 268040
25 315353
26 368654
27 428455
28 495236
29 569549
30 651910
31 742911
32 843104
33 953121
34 1073550
35 1205063
36 1348284

List of values

[0, 1, 14, 71, 220, 533, 1094, 2015, 3416, 5449, 8270, 12071, 17044, 23421, 31430, 41343, 53424, 67985, 85326, 105799, 129740, 157541, 189574, 226271, 268040, 315353, 368654, 428455, 495236, 569549, 651910, 742911, 843104, 953121, 1073550, 1205063, 1348284]