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 | 10 |
| 3 | 37 |
| 4 | 147 |
| 5 | 586 |
| 6 | 2341 |
| 7 | 9363 |
| 8 | 37450 |
| 9 | 149797 |
| 10 | 599187 |
| 11 | 2396746 |
| 12 | 9586981 |
| 13 | 38347923 |
| 14 | 153391690 |
| 15 | 613566757 |
| 16 | 2454267027 |
| 17 | 9817068106 |
| 18 | 39268272421 |
| 19 | 157073089683 |
| 20 | 628292358730 |
| 21 | 2513169434917 |
| 22 | 10052677739667 |
| 23 | 40210710958666 |