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| n | a(n) |
|---|---|
| 1 | 336 |
| 2 | 746 |
| 3 | 1684 |
| 4 | 3942 |
| 5 | 10348 |
| 6 | 27554 |
| 7 | 74784 |
| 8 | 212570 |
| 9 | 608476 |
| 10 | 1755630 |
| 11 | 5152996 |
| 12 | 15171626 |
| 13 | 44814936 |
| 14 | 133231586 |
| 15 | 396621844 |
| 16 | 1182345462 |
| 17 | 3533450908 |
| 18 | 10565961074 |
| 19 | 31613799504 |
| 20 | 94685091050 |
| 21 | 283660310476 |
| 22 | 850017916350 |
| 23 | 2548227410836 |
[336,746,1684,3942,10348,27554,74784,212570, 608476,1755630,5152996,15171626,44814936, 133231586,396621844,1182345462,3533450908, 10565961074,31613799504,94685091050,283660310476, 850017916350,2548227410836] |