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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 6 |
| 8 | 16 |
| 9 | 41 |
| 10 | 106 |
| 11 | 276 |
| 12 | 2101 |
| 13 | 6026 |
| 14 | 15976 |
| 15 | 41901 |
| 16 | 109726 |
| 17 | 835906 |
| 18 | 2397991 |
| 19 | 6358066 |
| 20 | 16676206 |
| 21 | 43670551 |
| 22 | 332688201 |
| 23 | 954394051 |
| 24 | 2530493951 |
| 25 | 6637087801 |
| 26 | 17380769451 |
| 27 | 132409067806 |
| 28 | 379846433966 |
| 29 | 1007130234091 |
| 30 | 2641544268306 |
| 31 | 6917502570826 |
| 32 | 52698476298301 |
[1,1,1,1,1,1,6,16,41,106,276,2101,6026,15976, 41901,109726,835906,2397991,6358066,16676206, 43670551,332688201,954394051,2530493951, 6637087801,17380769451,132409067806,379846433966, 1007130234091,2641544268306,6917502570826, 52698476298301] |