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.

A342759 Fold a square sheet of paper alternately vertically to the left and horizontally downwards; after each fold, draw a line along each inward crease; after n folds, the resulting graph has a(n) regions.

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 6
5 10
6 16
7 25
8 43
9 73
10 133
11 241
12 457
13 865
14 1681
15 3265
16 6433
17 12673
18 25153
19 49921
20 99457
21 198145
22 395521
23 789505
24 1577473
25 3151873
26 6300673
27 12595201
28 25184257
29 50356225
30 100700161

List of values

[1, 2, 3, 4, 6, 10, 16, 25, 43, 73, 133, 241, 457, 865, 1681, 3265, 6433, 12673, 25153, 49921, 99457, 198145, 395521, 789505, 1577473, 3151873, 6300673, 12595201, 25184257, 50356225, 100700161]