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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 14 |
| 4 | 46 |
| 5 | 145 |
| 6 | 462 |
| 7 | 1465 |
| 8 | 4641 |
| 9 | 14671 |
| 10 | 46298 |
| 11 | 145858 |
| 12 | 458811 |
| 13 | 1441204 |
| 14 | 4521255 |
| 15 | 14167145 |
| 16 | 44344445 |
| 17 | 138665650 |
| 18 | 433218100 |
| 19 | 1352333899 |
| 20 | 4218220602 |
| 21 | 13148256139 |
| 22 | 40956562683 |
| 23 | 127501720725 |
| 24 | 396702130246 |
| 25 | 1233632920766 |
[1,1,5,14,46,145,462,1465,4641,14671,46298,145858, 458811,1441204,4521255,14167145,44344445, 138665650,433218100,1352333899,4218220602, 13148256139,40956562683,127501720725,396702130246, 1233632920766] |