| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 80 |
| 3 | 226 |
| 4 | 596 |
| 5 | 1536 |
| 6 | 3966 |
| 7 | 10192 |
| 8 | 26572 |
| 9 | 69102 |
| 10 | 182368 |
| 11 | 479844 |
| 12 | 1278318 |
| 13 | 3393724 |
| 14 | 9100172 |
| 15 | 24316814 |
| 16 | 65498292 |
| 17 | 175852800 |
| 18 | 475172186 |
| 19 | 1280321244 |
| 20 | 3467619648 |
| 21 | 9369009790 |
| 22 | 25419829164 |
| 23 | 68829542860 |
| 24 | 187003542158 |
| 25 | 507226552512 |
[24,80,226,596,1536,3966,10192,26572,69102,182368, 479844,1278318,3393724,9100172,24316814,65498292, 175852800,475172186,1280321244,3467619648, 9369009790,25419829164,68829542860,187003542158, 507226552512] |