| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 19 |
| 3 | 112 |
| 4 | 368 |
| 5 | 2161 |
| 6 | 7033 |
| 7 | 41140 |
| 8 | 133730 |
| 9 | 781884 |
| 10 | 2541197 |
| 11 | 14856466 |
| 12 | 48283738 |
| 13 | 282274893 |
| 14 | 917394087 |
| 15 | 5363229225 |
| 16 | 17430497086 |
| 17 | 101901374524 |
| 18 | 331179473681 |
| 19 | 1936126175213 |
| 20 | 6292410089388 |
| 21 | 36786397511512 |
| 22 | 119555791973835 |
| 23 | 698941553280624 |
| 24 | 2271560048351176 |
[1,5,19,112,368,2161,7033,41140,133730,781884, 2541197,14856466,48283738,282274893,917394087, 5363229225,17430497086,101901374524,331179473681, 1936126175213,6292410089388,36786397511512, 119555791973835,698941553280624,2271560048351176] |