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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 41 |
| 5 | 122 |
| 6 | 366 |
| 7 | 1103 |
| 8 | 3332 |
| 9 | 10078 |
| 10 | 30503 |
| 11 | 92360 |
| 12 | 279722 |
| 13 | 847283 |
| 14 | 2566640 |
| 15 | 7775383 |
| 16 | 23555412 |
| 17 | 71361969 |
| 18 | 216195801 |
| 19 | 654983362 |
| 20 | 1984334264 |
| 21 | 6011741892 |
| 22 | 18213205238 |
| 23 | 55178866432 |
| 24 | 167170395758 |
| 25 | 506461095121 |
| 26 | 1534379837420 |
| 27 | 4648573702811 |
| 28 | 14083369899731 |
| 29 | 42667133594949 |
[1,2,5,14,41,122,366,1103,3332,10078,30503,92360, 279722,847283,2566640,7775383,23555412,71361969, 216195801,654983362,1984334264,6011741892, 18213205238,55178866432,167170395758,506461095121, 1534379837420,4648573702811,14083369899731, 42667133594949] |