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 | 7 |
| 2 | 28 |
| 3 | 84 |
| 4 | 210 |
| 5 | 462 |
| 6 | 924 |
| 7 | 1717 |
| 8 | 3017 |
| 9 | 5110 |
| 10 | 8568 |
| 11 | 14756 |
| 12 | 27132 |
| 13 | 54264 |
| 14 | 116281 |
| 15 | 257775 |
| 16 | 572264 |
| 17 | 1246784 |
| 18 | 2641366 |
| 19 | 5430530 |
| 20 | 10861060 |
| 21 | 21242341 |
| 22 | 40927033 |
| 23 | 78354346 |
| 24 | 150402700 |
| 25 | 291693136 |
| 26 | 574274008 |
| 27 | 1148548016 |
| 28 | 2326683921 |
| 29 | 4749439975 |
| 30 | 9714753412 |
| 31 | 19818498700 |
| 32 | 40199107690 |