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 | 4 |
| 2 | 6 |
| 3 | 9 |
| 4 | 15 |
| 5 | 121 |
| 6 | 253 |
| 7 | 361 |
| 8 | 437 |
| 9 | 451 |
| 10 | 473 |
| 11 | 527 |
| 12 | 671 |
| 13 | 703 |
| 14 | 799 |
| 15 | 851 |
| 16 | 901 |
| 17 | 923 |
| 18 | 979 |
| 19 | 1003 |
| 20 | 1027 |
| 21 | 1067 |
| 22 | 1081 |
| 23 | 1139 |
| 24 | 1157 |
| 25 | 1207 |
| 26 | 1247 |
| 27 | 1261 |
| 28 | 1333 |
| 29 | 1513 |
| 30 | 1517 |
| 31 | 1643 |
| 32 | 1711 |
| 33 | 2183 |
| 34 | 2291 |
| 35 | 2701 |
| 36 | 2813 |
| 37 | 3007 |
| 38 | 3403 |
| 39 | 3551 |
| 40 | 3589 |
| 41 | 3713 |
| 42 | 4307 |
| 43 | 4399 |
| 44 | 4489 |
| 45 | 5041 |
| 46 | 5063 |
| 47 | 5767 |