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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 22 |
| 4 | 94 |
| 5 | 399 |
| 6 | 1696 |
| 7 | 7243 |
| 8 | 31122 |
| 9 | 134623 |
| 10 | 586324 |
| 11 | 2570936 |
| 12 | 11347408 |
| 13 | 50401287 |
| 14 | 225215350 |
| 15 | 1012114200 |
| 16 | 4572954259 |
| 17 | 20766382311 |
| 18 | 94751225278 |
| 19 | 434246502792 |
| 20 | 1998426293942 |
| 21 | 9232496379669 |
| 22 | 42807004979015 |
| 23 | 199144155148587 |
[1,5,22,94,399,1696,7243,31122,134623,586324, 2570936,11347408,50401287,225215350,1012114200, 4572954259,20766382311,94751225278,434246502792, 1998426293942,9232496379669,42807004979015, 199144155148587] |