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 | 24 |
| 2 | 145 |
| 3 | 545 |
| 4 | 1575 |
| 5 | 3836 |
| 6 | 8274 |
| 7 | 16290 |
| 8 | 29865 |
| 9 | 51700 |
| 10 | 85371 |
| 11 | 135499 |
| 12 | 207935 |
| 13 | 309960 |
| 14 | 450500 |
| 15 | 640356 |
| 16 | 892449 |
| 17 | 1222080 |
| 18 | 1647205 |
| 19 | 2188725 |
| 20 | 2870791 |
| 21 | 3721124 |
| 22 | 4771350 |
| 23 | 6057350 |
| 24 | 7619625 |
| 25 | 9503676 |
| 26 | 11760399 |
| 27 | 14446495 |
| 28 | 17624895 |
| 29 | 21365200 |
| 30 | 25744136 |
| 31 | 30846024 |
| 32 | 36763265 |
| 33 | 43596840 |
| 34 | 51456825 |
| 35 | 60462921 |
| 36 | 70744999 |
| 37 | 82443660 |
| 38 | 95710810 |
| 39 | 110710250 |