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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 1764 |
| 3 | 14946 |
| 4 | 70216 |
| 5 | 239490 |
| 6 | 665892 |
| 7 | 1604862 |
| 8 | 3478160 |
| 9 | 6942474 |
| 10 | 12974340 |
| 11 | 22973082 |
| 12 | 38883480 |
| 13 | 63339874 |
| 14 | 99833412 |
| 15 | 152904150 |
| 16 | 228359712 |
| 17 | 333522218 |
| 18 | 477505188 |
| 19 | 671522130 |
| 20 | 929228520 |
| 21 | 1267098882 |
| 22 | 1704840676 |
| 23 | 2265846702 |
[42,1764,14946,70216,239490,665892,1604862, 3478160,6942474,12974340,22973082,38883480, 63339874,99833412,152904150,228359712,333522218, 477505188,671522130,929228520,1267098882, 1704840676,2265846702] |