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.

A189826 a(n) = (3^n-n)*(n-1) - 2^n*(n-2).

Table of values

n a(n)
1 2
2 7
3 40
4 199
5 856
6 3359
7 12440
8 44335
9 153808
10 523159
11 1752928
12 5804759
13 19041608
14 61981807
15 200458504
16 644783071
17 2064276256
18 6581953703
19 20911793168
20 66230028871
21 209167217752
22 658918365247
23 2070973772920
24 6495510239759
25 20334154874096
26 63545035094839

List of values

[2, 7, 40, 199, 856, 3359, 12440, 44335, 153808, 523159, 1752928, 5804759, 19041608, 61981807, 200458504, 644783071, 2064276256, 6581953703, 20911793168, 66230028871, 209167217752, 658918365247, 2070973772920, 6495510239759, 20334154874096, 63545035094839]