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 | 1 |
| 3 | 13 |
| 4 | 41 |
| 5 | 91 |
| 6 | 169 |
| 7 | 281 |
| 8 | 433 |
| 9 | 631 |
| 10 | 881 |
| 11 | 1189 |
| 12 | 1561 |
| 13 | 2003 |
| 14 | 2521 |
| 15 | 3121 |
| 16 | 3809 |
| 17 | 4591 |
| 18 | 5473 |
| 19 | 6461 |
| 20 | 7561 |
| 21 | 8779 |
| 22 | 10121 |
| 23 | 11593 |
| 24 | 13201 |
| 25 | 14951 |
| 26 | 16849 |
| 27 | 18901 |
| 28 | 21113 |
| 29 | 23491 |
| 30 | 26041 |
| 31 | 28769 |
| 32 | 31681 |
| 33 | 34783 |
| 34 | 38081 |
| 35 | 41581 |
| 36 | 45289 |
| 37 | 49211 |
| 38 | 53353 |
| 39 | 57721 |
| 40 | 62321 |
| 41 | 67159 |
| 42 | 72241 |