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.

A188714 G.f.: (1+x+x^2+x^3)/(1-3*x-3*x^2-3*x^3).

Table of values

n a(n)
0 1
1 4
2 16
3 64
4 252
5 996
6 3936
7 15552
8 61452
9 242820
10 959472
11 3791232
12 14980572
13 59193828
14 233896896
15 924213888
16 3651913836
17 14430073860
18 57018604752
19 225301777344
20 890251367868
21 3517715249892
22 13899805185312
23 54923315409216
24 217022507533260
25 857536884383364
26 3388448121977520
27 13389022541682432
28 52905022644129948
29 209047479923369700

List of values

[1, 4, 16, 64, 252, 996, 3936, 15552, 61452, 242820, 959472, 3791232, 14980572, 59193828, 233896896, 924213888, 3651913836, 14430073860, 57018604752, 225301777344, 890251367868, 3517715249892, 13899805185312, 54923315409216, 217022507533260, 857536884383364, 3388448121977520, 13389022541682432, 52905022644129948, 209047479923369700]