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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 12 |
| 6 | 27 |
| 7 | 54 |
| 8 | 115 |
| 9 | 237 |
| 10 | 486 |
| 11 | 997 |
| 12 | 2030 |
| 13 | 4122 |
| 14 | 8350 |
| 15 | 16881 |
| 16 | 34054 |
| 17 | 68609 |
| 18 | 138052 |
| 19 | 277500 |
| 20 | 557328 |
| 21 | 1118546 |
| 22 | 2243589 |
| 23 | 4498004 |
| 24 | 9014053 |
| 25 | 18058159 |
| 26 | 36166338 |
| 27 | 72415886 |
| 28 | 144970116 |
| 29 | 290170091 |
| 30 | 580721926 |
| 31 | 1162077483 |
| 32 | 2325206168 |
| 33 | 4652155420 |
| 34 | 9307199819 |