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 | 4 |
| 2 | 9 |
| 3 | 16 |
| 4 | 27 |
| 5 | 46 |
| 6 | 81 |
| 7 | 148 |
| 8 | 279 |
| 9 | 538 |
| 10 | 1053 |
| 11 | 2080 |
| 12 | 4131 |
| 13 | 8230 |
| 14 | 16425 |
| 15 | 32812 |
| 16 | 65583 |
| 17 | 131122 |
| 18 | 262197 |
| 19 | 524344 |
| 20 | 1048635 |
| 21 | 2097214 |
| 22 | 4194369 |
| 23 | 8388676 |
| 24 | 16777287 |
| 25 | 33554506 |
| 26 | 67108941 |
| 27 | 134217808 |
| 28 | 268435539 |
| 29 | 536870998 |
| 30 | 1073741913 |
| 31 | 2147483740 |