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.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 48 |
| 6 | 96 |
| 7 | 186 |
| 8 | 360 |
| 9 | 696 |
| 10 | 1344 |
| 11 | 2562 |
| 12 | 4872 |
| 13 | 9288 |
| 14 | 17664 |
| 15 | 33384 |
| 16 | 63120 |
| 17 | 119280 |
| 18 | 225072 |
| 19 | 423630 |
| 20 | 797400 |
| 21 | 1499256 |
| 22 | 2817216 |
| 23 | 5286480 |
| 24 | 9918768 |
| 25 | 18592080 |
| 26 | 34840848 |
| 27 | 65228874 |
| 28 | 122105496 |
| 29 | 228402168 |
| 30 | 427176336 |
| 31 | 798373662 |
| 32 | 1491985800 |
| 33 | 2786515176 |
| 34 | 5203816992 |
| 35 | 9712725234 |
| 36 | 18127267800 |