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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 14 |
| 4 | 9 |
| 5 | 27 |
| 6 | 61 |
| 7 | 75 |
| 8 | 281 |
| 9 | 697 |
| 10 | 1182 |
| 11 | 3379 |
| 12 | 8083 |
| 13 | 17008 |
| 14 | 44193 |
| 15 | 103747 |
| 16 | 232714 |
| 17 | 571581 |
| 18 | 1342911 |
| 19 | 3114718 |
| 20 | 7472335 |
| 21 | 17554474 |
| 22 | 41147561 |
| 23 | 97770072 |
| 24 | 230189903 |
| 25 | 541916214 |
| 26 | 1282131187 |
| 27 | 3021086562 |
| 28 | 7122374217 |
| 29 | 16823787888 |
| 30 | 39666365638 |
[1,1,14,9,27,61,75,281,697,1182,3379,8083,17008, 44193,103747,232714,571581,1342911,3114718, 7472335,17554474,41147561,97770072,230189903, 541916214,1282131187,3021086562,7122374217, 16823787888,39666365638] |