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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 25 |
| 3 | 125 |
| 4 | 612 |
| 5 | 2956 |
| 6 | 14125 |
| 7 | 66925 |
| 8 | 314935 |
| 9 | 1473779 |
| 10 | 6865098 |
| 11 | 31856590 |
| 12 | 147352985 |
| 13 | 679742085 |
| 14 | 3128486473 |
| 15 | 14370696813 |
| 16 | 65902020548 |
| 17 | 301787376436 |
| 18 | 1380297559417 |
| 19 | 6306497302225 |
| 20 | 28787967919963 |
| 21 | 131309246498679 |
| 22 | 598532215284482 |
[5,25,125,612,2956,14125,66925,314935,1473779, 6865098,31856590,147352985,679742085,3128486473, 14370696813,65902020548,301787376436, 1380297559417,6306497302225,28787967919963, 131309246498679,598532215284482] |