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| n | a(n) |
|---|---|
| 0 | 2097152 |
| 1 | 410338673 |
| 2 | 8031810176 |
| 3 | 64339296875 |
| 4 | 319277809664 |
| 5 | 1174711139837 |
| 6 | 3521614606208 |
| 7 | 9095120158391 |
| 8 | 20971520000000 |
| 9 | 44231334895529 |
| 10 | 86812553324672 |
| 11 | 160578147647843 |
| 12 | 282621973446656 |
| 13 | 476837158203125 |
| 14 | 775771085481344 |
| 15 | 1222791080775407 |
| 16 | 1874584905187328 |
[2097152,410338673,8031810176,64339296875, 319277809664,1174711139837,3521614606208, 9095120158391,20971520000000,44231334895529, 86812553324672,160578147647843,282621973446656, 476837158203125,775771085481344,1222791080775407, 1874584905187328] |