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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 21 |
| 4 | 92 |
| 5 | 414 |
| 6 | 1869 |
| 7 | 8427 |
| 8 | 37975 |
| 9 | 171121 |
| 10 | 771119 |
| 11 | 3474913 |
| 12 | 15659094 |
| 13 | 70564951 |
| 14 | 317988473 |
| 15 | 1432958824 |
| 16 | 6457375642 |
| 17 | 29099021980 |
| 18 | 131129599227 |
| 19 | 590912361256 |
| 20 | 2662842109828 |
| 21 | 11999627299824 |
| 22 | 54074199444301 |
| 23 | 243675821963849 |
| 24 | 1098082020999797 |
| 25 | 4948312537227216 |
[1,5,21,92,414,1869,8427,37975,171121,771119, 3474913,15659094,70564951,317988473,1432958824, 6457375642,29099021980,131129599227,590912361256, 2662842109828,11999627299824,54074199444301, 243675821963849,1098082020999797,4948312537227216] |