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 | 33 |
| 3 | 284 |
| 4 | 729 |
| 5 | 4096 |
| 6 | 7353 |
| 7 | 20249 |
| 8 | 37893 |
| 9 | 80545 |
| 10 | 117649 |
| 11 | 262144 |
| 12 | 354756 |
| 13 | 612724 |
| 14 | 882855 |
| 15 | 1398784 |
| 16 | 1771561 |
| 17 | 2985984 |
| 18 | 3661425 |
| 19 | 5323339 |
| 20 | 6888321 |
| 21 | 9595049 |
| 22 | 11390625 |
| 23 | 16777216 |
| 24 | 19566096 |
| 25 | 26006996 |
| 26 | 31736589 |
| 27 | 41119756 |
| 28 | 47045881 |
| 29 | 64000000 |
| 30 | 72407025 |