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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 102 |
| 4 | 297 |
| 5 | 932 |
| 6 | 2974 |
| 7 | 9723 |
| 8 | 32164 |
| 9 | 107568 |
| 10 | 362291 |
| 11 | 1226924 |
| 12 | 4170948 |
| 13 | 14218841 |
| 14 | 48567776 |
| 15 | 166128066 |
| 16 | 568812225 |
| 17 | 1948947544 |
| 18 | 6681079858 |
| 19 | 22911053867 |
| 20 | 78586955264 |
| 21 | 269607037796 |
| 22 | 925049643523 |
| 23 | 3174213970624 |
| 24 | 10892652172048 |
[6,36,102,297,932,2974,9723,32164,107568,362291, 1226924,4170948,14218841,48567776,166128066, 568812225,1948947544,6681079858,22911053867, 78586955264,269607037796,925049643523, 3174213970624,10892652172048] |