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) |
|---|---|
| 1 | 21 |
| 2 | 35 |
| 3 | 59 |
| 4 | 100 |
| 5 | 171 |
| 6 | 294 |
| 7 | 508 |
| 8 | 881 |
| 9 | 1532 |
| 10 | 2670 |
| 11 | 4661 |
| 12 | 8147 |
| 13 | 14254 |
| 14 | 24957 |
| 15 | 43721 |
| 16 | 76625 |
| 17 | 134335 |
| 18 | 235566 |
| 19 | 413157 |
| 20 | 724732 |
| 21 | 1271408 |
| 22 | 2230625 |
| 23 | 3913758 |
| 24 | 6867218 |
| 25 | 12049871 |
| 26 | 21144385 |
| 27 | 37103604 |
| 28 | 65109365 |
| 29 | 114255101 |
| 30 | 200498599 |
| 31 | 351843723 |