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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 25 |
| 3 | 92 |
| 4 | 340 |
| 5 | 1252 |
| 6 | 4616 |
| 7 | 17012 |
| 8 | 62696 |
| 9 | 231044 |
| 10 | 851496 |
| 11 | 3138100 |
| 12 | 11564952 |
| 13 | 42620580 |
| 14 | 157071768 |
| 15 | 578865076 |
| 16 | 2133318088 |
| 17 | 7862009732 |
| 18 | 28974227016 |
| 19 | 106780086132 |
| 20 | 393521606584 |
| 21 | 1450263256356 |
| 22 | 5344722135352 |
| 23 | 19697152196980 |
[5,25,92,340,1252,4616,17012,62696,231044,851496, 3138100,11564952,42620580,157071768,578865076, 2133318088,7862009732,28974227016,106780086132, 393521606584,1450263256356,5344722135352, 19697152196980] |