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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 48 |
| 3 | 302 |
| 4 | 1714 |
| 5 | 9085 |
| 6 | 46195 |
| 7 | 228384 |
| 8 | 1105510 |
| 9 | 5267662 |
| 10 | 24786180 |
| 11 | 115455033 |
| 12 | 533317129 |
| 13 | 2446323573 |
| 14 | 11154503019 |
| 15 | 50600348892 |
| 16 | 228514035985 |
| 17 | 1027932765869 |
| 18 | 4607917805325 |
| 19 | 20591918472965 |
| 20 | 91765529043193 |
| 21 | 407916504889146 |
[5,48,302,1714,9085,46195,228384,1105510,5267662, 24786180,115455033,533317129,2446323573, 11154503019,50600348892,228514035985, 1027932765869,4607917805325,20591918472965, 91765529043193,407916504889146] |