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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 4 |
| 5 | -11 |
| 6 | -38 |
| 7 | -70 |
| 8 | -100 |
| 9 | -130 |
| 10 | -172 |
| 11 | -238 |
| 12 | -328 |
| 13 | -429 |
| 14 | -528 |
| 15 | -627 |
| 16 | -744 |
| 17 | -897 |
| 18 | -1086 |
| 19 | -1292 |
| 20 | -1496 |
| 21 | -1700 |
| 22 | -1928 |
| 23 | -2204 |
| 24 | -2528 |
| 25 | -2875 |
| 26 | -3220 |
| 27 | -3565 |
| 28 | -3940 |
| 29 | -4375 |
| 30 | -4870 |
| 31 | -5394 |
| 32 | -5916 |
| 33 | -6438 |
| 34 | -6996 |
| 35 | -7626 |
| 36 | -8328 |
| 37 | -9065 |
| 38 | -9800 |
| 39 | -10535 |
| 40 | -11312 |
| 41 | -12173 |
| 42 | -13118 |
| 43 | -14104 |
| 44 | -15088 |
| 45 | -16072 |
| 46 | -17104 |