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 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 29 |
| 5 | 55 |
| 6 | 115 |
| 7 | 209 |
| 8 | 465 |
| 9 | 883 |
| 10 | 1847 |
| 11 | 3357 |
| 12 | 7437 |
| 13 | 14087 |
| 14 | 29443 |
| 15 | 53505 |
| 16 | 119041 |
| 17 | 226051 |
| 18 | 472839 |
| 19 | 859405 |
| 20 | 1903901 |
| 21 | 3606327 |
| 22 | 7537523 |
| 23 | 13697489 |
| 24 | 30474449 |
| 25 | 57868403 |
| 26 | 121045047 |
| 27 | 220004381 |
| 28 | 487391245 |
| 29 | 923205639 |
| 30 | 1929576451 |
| 31 | 3506503681 |
| 32 | 7801470977 |
| 33 | 14814478339 |
| 34 | 30987976711 |
| 35 | 56321966093 |