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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 29 |
| 7 | 54 |
| 8 | 96 |
| 9 | 165 |
| 10 | 275 |
| 11 | 449 |
| 12 | 716 |
| 13 | 1123 |
| 14 | 1732 |
| 15 | 2635 |
| 16 | 3955 |
| 17 | 5871 |
| 18 | 8620 |
| 19 | 12536 |
| 20 | 18065 |
| 21 | 25821 |
| 22 | 36617 |
| 23 | 51560 |
| 24 | 72105 |
| 25 | 100204 |
| 26 | 138417 |
| 27 | 190134 |
| 28 | 259772 |
| 29 | 353134 |
| 30 | 477734 |
| 31 | 643354 |
| 32 | 862604 |
| 33 | 1151773 |
| 34 | 1531738 |
| 35 | 2029305 |
| 36 | 2678650 |
| 37 | 3523378 |
| 38 | 4618835 |
| 39 | 6035240 |
| 40 | 7861292 |