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 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 37 |
| 7 | 75 |
| 8 | 167 |
| 9 | 359 |
| 10 | 785 |
| 11 | 1571 |
| 12 | 3447 |
| 13 | 6895 |
| 14 | 14367 |
| 15 | 29783 |
| 16 | 61303 |
| 17 | 122607 |
| 18 | 250783 |
| 19 | 501567 |
| 20 | 1018031 |
| 21 | 2053407 |
| 22 | 4127231 |
| 23 | 8254463 |
| 24 | 16610879 |
| 25 | 33311679 |
| 26 | 66737871 |
| 27 | 133719583 |
| 28 | 267778623 |
| 29 | 535557247 |
| 30 | 1072160511 |
| 31 | 2144321023 |
| 32 | 4291006911 |
| 33 | 8584417343 |
| 34 | 17171483103 |
| 35 | 34348627135 |
| 36 | 68706410943 |