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| n | a(n) |
|---|---|
| 1 | 8840 |
| 2 | 30360 |
| 3 | 106352 |
| 4 | 375756 |
| 5 | 1332504 |
| 6 | 4732480 |
| 7 | 16813550 |
| 8 | 59817840 |
| 9 | 212915478 |
| 10 | 758003332 |
| 11 | 2698865532 |
| 12 | 9609878582 |
| 13 | 34219609768 |
| 14 | 121858453182 |
| 15 | 433960960558 |
| 16 | 1545451040312 |
| 17 | 5503832271270 |
| 18 | 19601024153832 |
| 19 | 69806391180594 |
[8840,30360,106352,375756,1332504,4732480, 16813550,59817840,212915478,758003332,2698865532, 9609878582,34219609768,121858453182,433960960558, 1545451040312,5503832271270,19601024153832, 69806391180594] |