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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 18 |
| 6 | 59 |
| 7 | 1257 |
| 8 | 3830 |
| 9 | 12747 |
| 10 | 16577 |
| 11 | 29324 |
| 12 | 45901 |
| 13 | 75225 |
| 14 | 3205351 |
| 15 | 3280576 |
| 16 | 6485927 |
| 17 | 9766503 |
| 18 | 16252430 |
| 19 | 58523793 |
| 20 | 191823809 |
| 21 | 4086823782 |
| 22 | 12452295155 |
| 23 | 41443709247 |
| 24 | 53896004402 |
| 25 | 95339713649 |
| 26 | 149235718051 |
| 27 | 244575431700 |
| 28 | 10421403849451 |
| 29 | 10665979281151 |
[1,1,2,3,5,18,59,1257,3830,12747,16577,29324, 45901,75225,3205351,3280576,6485927,9766503, 16252430,58523793,191823809,4086823782, 12452295155,41443709247,53896004402,95339713649, 149235718051,244575431700,10421403849451, 10665979281151] |