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 | 8 |
| 4 | 36 |
| 5 | 167 |
| 6 | 693 |
| 7 | 2849 |
| 8 | 11459 |
| 9 | 46244 |
| 10 | 185622 |
| 11 | 743759 |
| 12 | 2974937 |
| 13 | 11907026 |
| 14 | 47643438 |
| 15 | 190606963 |
| 16 | 762449101 |
| 17 | 3049917900 |
| 18 | 12199777048 |
| 19 | 48799551822 |
| 20 | 195198666492 |
| 21 | 780796575104 |
| 22 | 3123189865122 |
| 23 | 12492766610068 |
| 24 | 49971069327602 |
| 25 | 199884317492186 |
| 26 | 799537344955292 |