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 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 20 |
| 7 | 42 |
| 8 | 88 |
| 9 | 117 |
| 10 | 245 |
| 11 | 513 |
| 12 | 682 |
| 13 | 1428 |
| 14 | 2990 |
| 15 | 3975 |
| 16 | 8323 |
| 17 | 17427 |
| 18 | 23168 |
| 19 | 48510 |
| 20 | 101572 |
| 21 | 135033 |
| 22 | 282737 |
| 23 | 592005 |
| 24 | 787030 |
| 25 | 1647912 |
| 26 | 3450458 |
| 27 | 4587147 |
| 28 | 9604735 |
| 29 | 20110743 |
| 30 | 26735852 |
| 31 | 55980498 |
| 32 | 117214000 |
| 33 | 155827965 |
| 34 | 326278253 |
| 35 | 683173257 |
| 36 | 908231938 |