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 | 4 |
| 3 | 42 |
| 4 | 176 |
| 5 | 540 |
| 6 | 1152 |
| 7 | 2534 |
| 8 | 4608 |
| 9 | 6984 |
| 10 | 12580 |
| 11 | 19250 |
| 12 | 26016 |
| 13 | 39988 |
| 14 | 55076 |
| 15 | 63570 |
| 16 | 97920 |
| 17 | 127024 |
| 18 | 155088 |
| 19 | 203946 |
| 20 | 253360 |
| 21 | 289044 |
| 22 | 378884 |
| 23 | 456918 |
| 24 | 528672 |
| 25 | 648200 |
| 26 | 763620 |
| 27 | 869022 |
| 28 | 1040368 |
| 29 | 1204196 |
| 30 | 1318440 |
| 31 | 1588750 |
| 32 | 1812224 |
| 33 | 2013132 |
| 34 | 2329476 |
| 35 | 2626330 |
| 36 | 2910672 |
| 37 | 3303804 |
| 38 | 3687748 |
| 39 | 4039854 |
| 40 | 4555520 |
| 41 | 5043000 |
| 42 | 5471088 |
| 43 | 6133778 |
| 44 | 6740976 |
| 45 | 7295760 |
| 46 | 8090020 |
| 47 | 8836094 |
| 48 | 9544128 |
| 49 | 10481296 |
| 50 | 11384900 |