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 | 1 |
| 2 | 9 |
| 3 | 31 |
| 4 | 73 |
| 5 | 141 |
| 6 | 241 |
| 7 | 379 |
| 8 | 561 |
| 9 | 793 |
| 10 | 1081 |
| 11 | 1431 |
| 12 | 1849 |
| 13 | 2341 |
| 14 | 2913 |
| 15 | 3571 |
| 16 | 4321 |
| 17 | 5169 |
| 18 | 6121 |
| 19 | 7183 |
| 20 | 8361 |
| 21 | 9661 |
| 22 | 11089 |
| 23 | 12651 |
| 24 | 14353 |
| 25 | 16201 |
| 26 | 18201 |
| 27 | 20359 |
| 28 | 22681 |
| 29 | 25173 |
| 30 | 27841 |
| 31 | 30691 |
| 32 | 33729 |
| 33 | 36961 |
| 34 | 40393 |
| 35 | 44031 |
| 36 | 47881 |
| 37 | 51949 |
| 38 | 56241 |
| 39 | 60763 |
| 40 | 65521 |