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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 35 |
| 4 | 115 |
| 5 | 1129 |
| 6 | 3697 |
| 7 | 12105 |
| 8 | 118907 |
| 9 | 389339 |
| 10 | 1274819 |
| 11 | 12522481 |
| 12 | 41002561 |
| 13 | 134255345 |
| 14 | 1318783307 |
| 15 | 4318113395 |
| 16 | 14138868147 |
| 17 | 138885370201 |
| 18 | 454754601649 |
| 19 | 1489010307001 |
| 20 | 14626471197755 |
| 21 | 47891689912619 |
| 22 | 156812530628611 |
| 23 | 1540361374197601 |
[1,1,11,35,115,1129,3697,12105,118907,389339, 1274819,12522481,41002561,134255345,1318783307, 4318113395,14138868147,138885370201,454754601649, 1489010307001,14626471197755,47891689912619, 156812530628611,1540361374197601] |