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 | 16 |
| 3 | 76 |
| 4 | 300 |
| 5 | 955 |
| 6 | 2648 |
| 7 | 6402 |
| 8 | 14339 |
| 9 | 28684 |
| 10 | 53450 |
| 11 | 91284 |
| 12 | 147064 |
| 13 | 221301 |
| 14 | 319067 |
| 15 | 433227 |
| 16 | 567565 |
| 17 | 700765 |
| 18 | 834464 |
| 19 | 947055 |
| 20 | 1050886 |
| 21 | 1114368 |
| 22 | 1157526 |
| 23 | 1150645 |
| 24 | 1117265 |
| 25 | 1044757 |
| 26 | 963722 |
| 27 | 855804 |
| 28 | 753172 |
| 29 | 633786 |
| 30 | 528122 |
| 31 | 426328 |
| 32 | 339866 |
| 33 | 264078 |
| 34 | 202013 |
| 35 | 150330 |
| 36 | 111055 |
| 37 | 78996 |
| 38 | 56123 |
| 39 | 38874 |
| 40 | 26644 |
| 41 | 17944 |
| 42 | 11898 |
| 43 | 7878 |
| 44 | 4945 |
| 45 | 3255 |
| 46 | 2024 |
| 47 | 1323 |
| 48 | 764 |
| 49 | 464 |
| 50 | 286 |
| 51 | 158 |
| 52 | 77 |
| 53 | 40 |
| 54 | 26 |
| 55 | 14 |
| 56 | 5 |
| 57 | 5 |
| 58 | 4 |
| 59 | 1 |
| 60 | 1 |