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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 26 |
| 6 | 98 |
| 7 | 389 |
| 8 | 1617 |
| 9 | 6884 |
| 10 | 29818 |
| 11 | 131284 |
| 12 | 585966 |
| 13 | 2644084 |
| 14 | 12041541 |
| 15 | 55280357 |
| 16 | 255556439 |
| 17 | 1188632292 |
| 18 | 5558332388 |
| 19 | 26116960640 |
| 20 | 123243816854 |
| 21 | 583830832350 |
| 22 | 2775426824820 |
| 23 | 13235989547850 |
| 24 | 63306397853250 |
| 25 | 303597924249840 |
| 26 | 1459546439694004 |
| 27 | 7032721684219584 |
| 28 | 33958054240107363 |
| 29 | 164290025822878210 |
| 30 | 796288552943558821 |
| 31 | 3866056901078138147 |
| 32 | 18799970286124092609 |
| 33 | 91557579962243322708 |
[1,1,2,7,26,98,389,1617,6884,29818,131284,585966, 2644084,12041541,55280357,255556439,1188632292, 5558332388,26116960640,123243816854,583830832350, 2775426824820,13235989547850,63306397853250, 303597924249840,1459546439694004,7032721684219584, 33958054240107363,164290025822878210, 796288552943558821,3866056901078138147, 18799970286124092609,91557579962243322708] |