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 | 19 |
| 4 | 42 |
| 5 | 76 |
| 6 | 156 |
| 7 | 283 |
| 8 | 570 |
| 9 | 1046 |
| 10 | 2096 |
| 11 | 3890 |
| 12 | 7784 |
| 13 | 14582 |
| 14 | 29168 |
| 15 | 55051 |
| 16 | 110106 |
| 17 | 209062 |
| 18 | 418128 |
| 19 | 797806 |
| 20 | 1595616 |
| 21 | 3056868 |
| 22 | 6113740 |
| 23 | 11752674 |
| 24 | 23505352 |
| 25 | 45316896 |
| 26 | 90633796 |
| 27 | 175175816 |
| 28 | 350351636 |
| 29 | 678639146 |
| 30 | 1357278296 |