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.

A083658 a(n) = a(n-1) + a(n-2) + gcd(a(n-1), a(n-2)) for n > 1; a(0)=1, a(1)=1.

Table of values

n a(n)
0 1
1 1
2 3
3 5
4 9
5 15
6 27
7 45
8 81
9 135
10 243
11 405
12 729
13 1215
14 2187
15 3645
16 6561
17 10935
18 19683
19 32805
20 59049
21 98415
22 177147
23 295245
24 531441
25 885735
26 1594323
27 2657205
28 4782969
29 7971615
30 14348907
31 23914845
32 43046721
33 71744535
34 129140163
35 215233605
36 387420489

List of values

[1, 1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 2187, 3645, 6561, 10935, 19683, 32805, 59049, 98415, 177147, 295245, 531441, 885735, 1594323, 2657205, 4782969, 7971615, 14348907, 23914845, 43046721, 71744535, 129140163, 215233605, 387420489]