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 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 27 |
| 6 | 56 |
| 7 | 115 |
| 8 | 235 |
| 9 | 478 |
| 10 | 969 |
| 11 | 1959 |
| 12 | 3952 |
| 13 | 7959 |
| 14 | 16007 |
| 15 | 32158 |
| 16 | 64549 |
| 17 | 129475 |
| 18 | 259560 |
| 19 | 520107 |
| 20 | 1041811 |
| 21 | 2086206 |
| 22 | 4176593 |
| 23 | 8359951 |
| 24 | 16730848 |
| 25 | 33479407 |
| 26 | 66987471 |
| 27 | 134021310 |
| 28 | 268117645 |
| 29 | 536356683 |
| 30 | 1072909784 |
| 31 | 2146137379 |
| 32 | 4292788987 |
| 33 | 8586410014 |