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 | 20 |
| 1 | 130 |
| 2 | 330 |
| 3 | 620 |
| 4 | 1000 |
| 5 | 1470 |
| 6 | 2030 |
| 7 | 2680 |
| 8 | 3420 |
| 9 | 4250 |
| 10 | 5170 |
| 11 | 6180 |
| 12 | 7280 |
| 13 | 8470 |
| 14 | 9750 |
| 15 | 11120 |
| 16 | 12580 |
| 17 | 14130 |
| 18 | 15770 |
| 19 | 17500 |
| 20 | 19320 |
| 21 | 21230 |
| 22 | 23230 |
| 23 | 25320 |
| 24 | 27500 |
| 25 | 29770 |
| 26 | 32130 |
| 27 | 34580 |
| 28 | 37120 |
| 29 | 39750 |
| 30 | 42470 |
| 31 | 45280 |
| 32 | 48180 |
| 33 | 51170 |
| 34 | 54250 |
| 35 | 57420 |
| 36 | 60680 |
| 37 | 64030 |
| 38 | 67470 |
| 39 | 71000 |
| 40 | 74620 |