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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 14 |
| 3 | 37 |
| 4 | 109 |
| 5 | 324 |
| 6 | 915 |
| 7 | 2402 |
| 8 | 5843 |
| 9 | 13229 |
| 10 | 28071 |
| 11 | 56234 |
| 12 | 107080 |
| 13 | 194989 |
| 14 | 341334 |
| 15 | 576993 |
| 16 | 945488 |
| 17 | 1506848 |
| 18 | 2342300 |
| 19 | 3559899 |
| 20 | 5301215 |
| 21 | 7749202 |
| 22 | 11137381 |
| 23 | 15760476 |
| 24 | 21986649 |
| 25 | 30271487 |
| 26 | 41173901 |
| 27 | 55374104 |
| 28 | 73693842 |
| 29 | 97119059 |
| 30 | 126825184 |
[6,14,37,109,324,915,2402,5843,13229,28071,56234, 107080,194989,341334,576993,945488,1506848, 2342300,3559899,5301215,7749202,11137381,15760476, 21986649,30271487,41173901,55374104,73693842, 97119059,126825184] |