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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 33 |
| 4 | 119 |
| 5 | 457 |
| 6 | 1710 |
| 7 | 6466 |
| 8 | 24433 |
| 9 | 92196 |
| 10 | 347977 |
| 11 | 1313608 |
| 12 | 4958107 |
| 13 | 18714962 |
| 14 | 70641589 |
| 15 | 266642543 |
| 16 | 1006466983 |
| 17 | 3799003546 |
| 18 | 14339684590 |
| 19 | 54126460553 |
| 20 | 204305303067 |
| 21 | 771169136489 |
| 22 | 2910848804238 |
| 23 | 10987266400303 |
| 24 | 41472446978323 |
[1,7,33,119,457,1710,6466,24433,92196,347977, 1313608,4958107,18714962,70641589,266642543, 1006466983,3799003546,14339684590,54126460553, 204305303067,771169136489,2910848804238, 10987266400303,41472446978323] |