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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 16 |
| 6 | 32 |
| 7 | 64 |
| 8 | 128 |
| 9 | 256 |
| 10 | 511 |
| 11 | 1021 |
| 12 | 2040 |
| 13 | 4076 |
| 14 | 8144 |
| 15 | 16272 |
| 16 | 32512 |
| 17 | 64960 |
| 18 | 129792 |
| 19 | 259328 |
| 20 | 518145 |
| 21 | 1035269 |
| 22 | 2068498 |
| 23 | 4132920 |
| 24 | 8257696 |
| 25 | 16499120 |
| 26 | 32965728 |
| 27 | 65866496 |
| 28 | 131603200 |
| 29 | 262947072 |
| 30 | 525375999 |
| 31 | 1049716729 |
| 32 | 2097364960 |
| 33 | 4190597000 |
| 34 | 8372936304 |
| 35 | 16729373488 |
| 36 | 33425781248 |