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.

A190980 a(n) = 9*a(n-1) - 3*a(n-2), with a(0)=0, a(1)=1.

Table of values

n a(n)
0 0
1 1
2 9
3 78
4 675
5 5841
6 50544
7 437373
8 3784725
9 32750406
10 283399479
11 2452344093
12 21220898400
13 183631053321
14 1589016784689
15 13750257902238
16 118985270766075
17 1029616663187961
18 8909594156393424
19 77097497417976933
20 667148694292612125
21 5773045756379578326

List of values

[0, 1, 9, 78, 675, 5841, 50544, 437373, 3784725, 32750406, 283399479, 2452344093, 21220898400, 183631053321, 1589016784689, 13750257902238, 118985270766075, 1029616663187961, 8909594156393424, 77097497417976933, 667148694292612125, 5773045756379578326]