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| n | a(n) |
|---|---|
| 1 | 636 |
| 2 | 1968 |
| 3 | 4980 |
| 4 | 11016 |
| 5 | 22092 |
| 6 | 41088 |
| 7 | 71964 |
| 8 | 120000 |
| 9 | 192060 |
| 10 | 296880 |
| 11 | 445380 |
| 12 | 651000 |
| 13 | 930060 |
| 14 | 1302144 |
| 15 | 1790508 |
| 16 | 2422512 |
| 17 | 3230076 |
| 18 | 4250160 |
| 19 | 5525268 |
| 20 | 7103976 |
| 21 | 9041484 |
| 22 | 11400192 |
| 23 | 14250300 |
| 24 | 17670432 |
| 25 | 21748284 |
| 26 | 26581296 |
| 27 | 32277348 |
| 28 | 38955480 |
[636,1968,4980,11016,22092,41088,71964,120000, 192060,296880,445380,651000,930060,1302144, 1790508,2422512,3230076,4250160,5525268,7103976, 9041484,11400192,14250300,17670432,21748284, 26581296,32277348,38955480] |