| n | a(n) |
|---|---|
| 1 | 28 |
| 2 | 222 |
| 3 | 964 |
| 4 | 2995 |
| 5 | 7536 |
| 6 | 16408 |
| 7 | 32152 |
| 8 | 58149 |
| 9 | 98740 |
| 10 | 159346 |
| 11 | 246588 |
| 12 | 368407 |
| 13 | 534184 |
| 14 | 754860 |
| 15 | 1043056 |
| 16 | 1413193 |
| 17 | 1881612 |
| 18 | 2466694 |
| 19 | 3188980 |
| 20 | 4071291 |
| 21 | 5138848 |
| 22 | 6419392 |
| 23 | 7943304 |
| 24 | 9743725 |
| 25 | 11856676 |
| 26 | 14321178 |
| 27 | 17179372 |
| 28 | 20476639 |
| 29 | 24261720 |
[28,222,964,2995,7536,16408,32152,58149,98740, 159346,246588,368407,534184,754860,1043056, 1413193,1881612,2466694,3188980,4071291,5138848, 6419392,7943304,9743725,11856676,14321178, 17179372,20476639,24261720] |