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.

A215817 a(n) is the rational part of A(n) = (6-sqrt(7))*A(n-1) - (12-4*sqrt(7))*A(n-2) + (8-3*sqrt(7))*A(n-3) with A(0)=3, A(1)=6-sqrt(7), A(2)=19-4*sqrt(7).

Table of values

n a(n)
0 3
1 6
2 19
3 66
4 237
5 866
6 3202
7 11948
8 44917
9 169914
10 646134
11 2467988
12 9462498
13 36398004
14 140399901
15 542894726
16 2103745125
17 8167514346
18 31762430143
19 123704647562
20 482435457922
21 1883712663668
22 7363103647479
23 28809291337986
24 112820819490970
25 442175629583316

List of values

[3, 6, 19, 66, 237, 866, 3202, 11948, 44917, 169914, 646134, 2467988, 9462498, 36398004, 140399901, 542894726, 2103745125, 8167514346, 31762430143, 123704647562, 482435457922, 1883712663668, 7363103647479, 28809291337986, 112820819490970, 442175629583316]