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 | 4 |
| 2 | 9 |
| 3 | 18 |
| 4 | 30 |
| 5 | 52 |
| 6 | 74 |
| 7 | 112 |
| 8 | 154 |
| 9 | 210 |
| 10 | 268 |
| 11 | 352 |
| 12 | 436 |
| 13 | 552 |
| 14 | 668 |
| 15 | 802 |
| 16 | 948 |
| 17 | 1134 |
| 18 | 1316 |
| 19 | 1546 |
| 20 | 1778 |
| 21 | 2038 |
| 22 | 2306 |
| 23 | 2630 |
| 24 | 2952 |
| 25 | 3326 |
| 26 | 3704 |
| 27 | 4124 |
| 28 | 4556 |
| 29 | 5060 |
| 30 | 5552 |
| 31 | 6126 |
| 32 | 6710 |
| 33 | 7338 |
| 34 | 7978 |
| 35 | 8674 |
| 36 | 9376 |
| 37 | 10174 |
| 38 | 10972 |
| 39 | 11824 |
| 40 | 12692 |
| 41 | 13664 |
| 42 | 14620 |
| 43 | 15690 |
| 44 | 16768 |
| 45 | 17898 |
| 46 | 19048 |
| 47 | 20314 |
| 48 | 21574 |
| 49 | 22944 |
| 50 | 24312 |