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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 38 |
| 4 | 130 |
| 5 | 334 |
| 6 | 846 |
| 7 | 1722 |
| 8 | 3572 |
| 9 | 6513 |
| 10 | 11806 |
| 11 | 19458 |
| 12 | 32948 |
| 13 | 50400 |
| 14 | 79290 |
| 15 | 117092 |
| 16 | 174256 |
| 17 | 245173 |
| 18 | 354249 |
| 19 | 480718 |
| 20 | 670420 |
| 21 | 891690 |
| 22 | 1203578 |
| 23 | 1560802 |
| 24 | 2076496 |
| 25 | 2630915 |
| 26 | 3416352 |
| 27 | 4285152 |
| 28 | 5461348 |
| 29 | 6724548 |
| 30 | 8490884 |
| 31 | 10295502 |
| 32 | 12798224 |
| 33 | 15420213 |
| 34 | 18888861 |
[1,9,38,130,334,846,1722,3572,6513,11806,19458, 32948,50400,79290,117092,174256,245173,354249, 480718,670420,891690,1203578,1560802,2076496, 2630915,3416352,4285152,5461348,6724548,8490884, 10295502,12798224,15420213,18888861] |