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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 33 |
| 4 | 150 |
| 5 | 697 |
| 6 | 3304 |
| 7 | 15856 |
| 8 | 76779 |
| 9 | 373987 |
| 10 | 1830987 |
| 11 | 8995672 |
| 12 | 44323228 |
| 13 | 218889525 |
| 14 | 1082922623 |
| 15 | 5365602826 |
| 16 | 26617684027 |
| 17 | 132178009958 |
| 18 | 656929238725 |
| 19 | 3267295325023 |
| 20 | 16260065946198 |
| 21 | 80962304089982 |
| 22 | 403308862138424 |
| 23 | 2009838430795841 |
| 24 | 10019154307564865 |
| 25 | 49960740258061616 |
| 26 | 249194818499378273 |
[1,2,8,33,150,697,3304,15856,76779,373987,1830987, 8995672,44323228,218889525,1082922623,5365602826, 26617684027,132178009958,656929238725, 3267295325023,16260065946198,80962304089982, 403308862138424,2009838430795841, 10019154307564865,49960740258061616, 249194818499378273] |