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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 36 |
| 6 | 94 |
| 7 | 243 |
| 8 | 628 |
| 9 | 1619 |
| 10 | 4178 |
| 11 | 10776 |
| 12 | 27793 |
| 13 | 71682 |
| 14 | 184879 |
| 15 | 476832 |
| 16 | 1229830 |
| 17 | 3171942 |
| 18 | 8180989 |
| 19 | 21100215 |
| 20 | 54421187 |
| 21 | 140361900 |
| 22 | 362018270 |
| 23 | 933709453 |
| 24 | 2408202606 |
| 25 | 6211182512 |
| 26 | 16019743522 |
| 27 | 41317765457 |
| 28 | 106565859669 |
| 29 | 274852289679 |
| 30 | 708892898170 |
| 31 | 1828360759013 |
| 32 | 4715667307920 |
[1,1,2,5,14,36,94,243,628,1619,4178,10776,27793, 71682,184879,476832,1229830,3171942,8180989, 21100215,54421187,140361900,362018270,933709453, 2408202606,6211182512,16019743522,41317765457, 106565859669,274852289679,708892898170, 1828360759013,4715667307920] |