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.

A382618 a(n) = 3^(n-2)*(binomial(n,2) + 3*n + 9).

Table of values

n a(n)
0 1
1 4
2 16
3 63
4 243
5 918
6 3402
7 12393
8 44469
9 157464
10 551124
11 1909251
12 6554439
13 22320522
14 75464622
15 253497357
16 846585513
17 2812385772
18 9298091736
19 30606218631
20 100341906651
21 327757733694
22 1066956026706
23 3462376910193
24 11203038280413
25 36150980669568
26 116360969030172

List of values

[1, 4, 16, 63, 243, 918, 3402, 12393, 44469, 157464, 551124, 1909251, 6554439, 22320522, 75464622, 253497357, 846585513, 2812385772, 9298091736, 30606218631, 100341906651, 327757733694, 1066956026706, 3462376910193, 11203038280413, 36150980669568, 116360969030172]