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.

A087438 a(n) = 3*2^(2*(n-1)) + 2^(n-2)*(n+1).

Table of values

n a(n)
0 1
1 4
2 15
3 56
4 212
5 816
6 3184
7 12544
8 49728
9 197888
10 789248
11 3151872
12 12596224
13 50360320
14 201388032
15 805437440
16 3221504000
17 12885491712
18 51540852736
19 206161051648
20 824639225856
21 3298546417664
22 13194163650560
23 52776608464896

List of values

[1, 4, 15, 56, 212, 816, 3184, 12544, 49728, 197888, 789248, 3151872, 12596224, 50360320, 201388032, 805437440, 3221504000, 12885491712, 51540852736, 206161051648, 824639225856, 3298546417664, 13194163650560, 52776608464896]