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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 14 |
| 4 | 45 |
| 5 | 106 |
| 6 | 290 |
| 7 | 683 |
| 8 | 1698 |
| 9 | 3918 |
| 10 | 9179 |
| 11 | 20640 |
| 12 | 46444 |
| 13 | 101819 |
| 14 | 222092 |
| 15 | 475886 |
| 16 | 1012270 |
| 17 | 2124725 |
| 18 | 4425195 |
| 19 | 9118705 |
| 20 | 18648048 |
| 21 | 37797126 |
| 22 | 76062443 |
| 23 | 151889787 |
| 24 | 301296200 |
| 25 | 593593192 |
| 26 | 1162276735 |
| 27 | 2261819285 |
| 28 | 4376578818 |
| 29 | 8421295585 |
| 30 | 16118902083 |
| 31 | 30694325652 |
| 32 | 58164428059 |
[1,1,6,14,45,106,290,683,1698,3918,9179,20640, 46444,101819,222092,475886,1012270,2124725, 4425195,9118705,18648048,37797126,76062443, 151889787,301296200,593593192,1162276735, 2261819285,4376578818,8421295585,16118902083, 30694325652,58164428059] |