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| n | a(n) |
|---|---|
| 1 | 1388 |
| 2 | 3090 |
| 3 | 4196 |
| 4 | 6931 |
| 5 | 13528 |
| 6 | 29370 |
| 7 | 68992 |
| 8 | 172050 |
| 9 | 449608 |
| 10 | 1219050 |
| 11 | 3400912 |
| 12 | 9693570 |
| 13 | 28065688 |
| 14 | 82170330 |
| 15 | 242460832 |
| 16 | 719285490 |
| 17 | 2141665768 |
| 18 | 6392619210 |
| 19 | 19113104752 |
| 20 | 57209811810 |
| 21 | 171370433848 |
| 22 | 513593301690 |
| 23 | 1539743908672 |
[1388,3090,4196,6931,13528,29370,68992,172050, 449608,1219050,3400912,9693570,28065688,82170330, 242460832,719285490,2141665768,6392619210, 19113104752,57209811810,171370433848,513593301690, 1539743908672] |