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.

A120140 a(n) = 13 + floor(Sum_{j=1..n-1} a(j)/2).

Table of values

n a(n)
1 13
2 19
3 29
4 43
5 65
6 97
7 146
8 219
9 328
10 492
11 738
12 1107
13 1661
14 2491
15 3737
16 5605
17 8408
18 12612
19 18918
20 28377
21 42565
22 63848
23 95772
24 143658
25 215487
26 323230
27 484845
28 727268
29 1090902
30 1636353
31 2454529
32 3681794
33 5522691
34 8284036
35 12426054
36 18639081

List of values

[13, 19, 29, 43, 65, 97, 146, 219, 328, 492, 738, 1107, 1661, 2491, 3737, 5605, 8408, 12612, 18918, 28377, 42565, 63848, 95772, 143658, 215487, 323230, 484845, 727268, 1090902, 1636353, 2454529, 3681794, 5522691, 8284036, 12426054, 18639081]