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| n | a(n) |
|---|---|
| 13 | 1 |
| 14 | 2 |
| 15 | 9 |
| 16 | 21 |
| 17 | 76 |
| 18 | 191 |
| 19 | 581 |
| 20 | 1498 |
| 21 | 4289 |
| 22 | 11178 |
| 23 | 30228 |
| 24 | 78312 |
| 25 | 203322 |
| 26 | 514698 |
| 27 | 1290717 |
| 28 | 3171500 |
| 29 | 7686889 |
| 30 | 18362852 |
| 31 | 43125402 |
| 32 | 100023839 |
| 33 | 228749022 |
| 34 | 516594768 |
| 35 | 1152434619 |
| 36 | 2544058688 |
| 37 | 5553758793 |
| 38 | 12013758677 |
[1,2,9,21,76,191,581,1498,4289,11178,30228,78312, 203322,514698,1290717,3171500,7686889,18362852, 43125402,100023839,228749022,516594768,1152434619, 2544058688,5553758793,12013758677] |