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.

A212509 Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<=3z.

Table of values

n a(n)
0 0
1 1
2 12
3 63
4 180
5 437
6 891
7 1628
8 2736
9 4392
10 6600
11 9646
12 13608
13 18669
14 24990
15 32955
16 42432
17 54033
18 67797
19 84010
20 102900
21 125118
22 150282
23 179444
24 212544
25 249977
26 292032
27 339687
28 392196
29 451165
30 516375
31 588336
32 667392
33 754908
34 849660
35 953922
36 1067256

List of values

[0, 1, 12, 63, 180, 437, 891, 1628, 2736, 4392, 6600, 9646, 13608, 18669, 24990, 32955, 42432, 54033, 67797, 84010, 102900, 125118, 150282, 179444, 212544, 249977, 292032, 339687, 392196, 451165, 516375, 588336, 667392, 754908, 849660, 953922, 1067256]