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) |
|---|---|
| 2 | 7 |
| 3 | 31 |
| 4 | 113 |
| 5 | 359 |
| 6 | 1129 |
| 7 | 3089 |
| 8 | 8467 |
| 9 | 24281 |
| 10 | 64717 |
| 11 | 175141 |
| 12 | 481447 |
| 13 | 1304713 |
| 14 | 3524621 |
| 15 | 9560081 |
| 16 | 25874773 |
| 17 | 70119967 |
| 18 | 189969349 |
| 19 | 514282961 |
| 20 | 1394199299 |
| 21 | 3779856617 |
| 22 | 10246936393 |
| 23 | 27788573801 |
| 24 | 75370126379 |
| 25 | 204475055189 |
| 26 | 554805820519 |
| 27 | 1505578026059 |
| 28 | 4086199303001 |
| 29 | 11091501632977 |