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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 512 |
| 12 | 513 |
| 13 | 514 |
| 14 | 515 |
| 15 | 516 |
| 16 | 517 |
| 17 | 518 |
| 18 | 519 |
| 19 | 520 |
| 20 | 1024 |
| 21 | 1025 |
| 22 | 1026 |
| 23 | 1027 |
| 24 | 1028 |
| 25 | 1029 |
| 26 | 1030 |
| 27 | 1031 |
| 28 | 1536 |
| 29 | 1537 |
| 30 | 1538 |
| 31 | 1539 |
| 32 | 1540 |
| 33 | 1541 |
| 34 | 1542 |
| 35 | 2048 |
| 36 | 2049 |
| 37 | 2050 |
| 38 | 2051 |
| 39 | 2052 |
| 40 | 2053 |
| 41 | 2560 |
| 42 | 2561 |
| 43 | 2562 |
| 44 | 2563 |
| 45 | 2564 |
| 46 | 3072 |
| 47 | 3073 |
| 48 | 3074 |
| 49 | 3075 |
| 50 | 3584 |