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.

A384198 a(n) = 3^(n-3)*(binomial(n,3) + 3*binomial(n,2) + 9*n + 27).

Table of values

n a(n)
0 1
1 4
2 16
3 64
4 255
5 1008
6 3942
7 15228
8 58077
9 218700
10 813564
11 2991816
12 10884699
13 39208536
14 139946130
15 495303012
16 1739406393
17 6064804692
18 21006799848
19 72318491280
20 247561692471
21 843026984064
22 2856838685886
23 9637472084364
24 32374793163285
25 108327417770268
26 361133233980372

List of values

[1, 4, 16, 64, 255, 1008, 3942, 15228, 58077, 218700, 813564, 2991816, 10884699, 39208536, 139946130, 495303012, 1739406393, 6064804692, 21006799848, 72318491280, 247561692471, 843026984064, 2856838685886, 9637472084364, 32374793163285, 108327417770268, 361133233980372]