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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 46 |
| 5 | 160 |
| 6 | 585 |
| 7 | 2194 |
| 8 | 8507 |
| 9 | 33660 |
| 10 | 135829 |
| 11 | 555508 |
| 12 | 2302992 |
| 13 | 9648857 |
| 14 | 40825201 |
| 15 | 174125274 |
| 16 | 748213686 |
| 17 | 3235831779 |
| 18 | 14076651319 |
| 19 | 61555853379 |
| 20 | 270458641654 |
| 21 | 1193435185861 |
| 22 | 5286972475995 |
| 23 | 23505960789634 |
| 24 | 104854537699871 |
| 25 | 469163718426154 |
| 26 | 2105190929074574 |
| 27 | 9471098332799122 |
[1,2,5,14,46,160,585,2194,8507,33660,135829, 555508,2302992,9648857,40825201,174125274, 748213686,3235831779,14076651319,61555853379, 270458641654,1193435185861,5286972475995, 23505960789634,104854537699871,469163718426154, 2105190929074574,9471098332799122] |