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 | 1 |
| 2 | 6 |
| 3 | 19 |
| 4 | 48 |
| 5 | 109 |
| 6 | 234 |
| 7 | 487 |
| 8 | 996 |
| 9 | 2017 |
| 10 | 4062 |
| 11 | 8155 |
| 12 | 16344 |
| 13 | 32725 |
| 14 | 65490 |
| 15 | 131023 |
| 16 | 262092 |
| 17 | 524233 |
| 18 | 1048518 |
| 19 | 2097091 |
| 20 | 4194240 |
| 21 | 8388541 |
| 22 | 16777146 |
| 23 | 33554359 |
| 24 | 67108788 |
| 25 | 134217649 |
| 26 | 268435374 |
| 27 | 536870827 |
| 28 | 1073741736 |
| 29 | 2147483557 |
| 30 | 4294967202 |
| 31 | 8589934495 |
| 32 | 17179869084 |
| 33 | 34359738265 |