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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 15 |
| 6 | 44 |
| 7 | 91 |
| 8 | 300 |
| 9 | 675 |
| 10 | 2246 |
| 11 | 5225 |
| 12 | 18369 |
| 13 | 44590 |
| 14 | 157351 |
| 15 | 389281 |
| 16 | 1418064 |
| 17 | 3598815 |
| 18 | 13127212 |
| 19 | 33721485 |
| 20 | 125539307 |
| 21 | 327997148 |
| 22 | 1221478559 |
| 23 | 3218359939 |
| 24 | 12154464884 |
| 25 | 32412375855 |
| 26 | 122407772319 |
| 27 | 328464178536 |
| 28 | 1253012930330 |
| 29 | 3392521591292 |
| 30 | 12940473812157 |
| 31 | 35205364700389 |
| 32 | 135293932230274 |
[1,1,2,3,8,15,44,91,300,675,2246,5225,18369,44590, 157351,389281,1418064,3598815,13127212,33721485, 125539307,327997148,1221478559,3218359939, 12154464884,32412375855,122407772319,328464178536, 1253012930330,3392521591292,12940473812157, 35205364700389,135293932230274] |