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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 28 |
| 2 | 308 |
| 3 | 1218 |
| 4 | 3298 |
| 5 | 7250 |
| 6 | 13938 |
| 7 | 24388 |
| 8 | 39788 |
| 9 | 61488 |
| 10 | 91000 |
| 11 | 129998 |
| 12 | 180318 |
| 13 | 243958 |
| 14 | 323078 |
| 15 | 420000 |
| 16 | 537208 |
| 17 | 677348 |
| 18 | 843228 |
| 19 | 1037818 |
| 20 | 1264250 |
| 21 | 1525818 |
| 22 | 1825978 |
| 23 | 2168348 |
| 24 | 2556708 |
| 25 | 2995000 |
| 26 | 3487328 |
| 27 | 4037958 |
| 28 | 4651318 |
| 29 | 5331998 |
| 30 | 6084750 |
[0,28,308,1218,3298,7250,13938,24388,39788,61488, 91000,129998,180318,243958,323078,420000,537208, 677348,843228,1037818,1264250,1525818,1825978, 2168348,2556708,2995000,3487328,4037958,4651318, 5331998,6084750] |