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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 13 |
| 3 | 25 |
| 4 | 51 |
| 5 | 125 |
| 6 | 295 |
| 7 | 625 |
| 8 | 1345 |
| 9 | 3125 |
| 10 | 7173 |
| 11 | 15625 |
| 12 | 34269 |
| 13 | 78125 |
| 14 | 177153 |
| 15 | 390625 |
| 16 | 864315 |
| 17 | 1953125 |
| 18 | 4401655 |
| 19 | 9765625 |
| 20 | 21706831 |
| 21 | 48828125 |
| 22 | 109676283 |
| 23 | 244140625 |
| 24 | 544031251 |
| 25 | 1220703125 |
| 26 | 2736797215 |
| 27 | 6103515625 |
| 28 | 13620096675 |
| 29 | 30517578125 |
| 30 | 68346531855 |
[1,5,13,25,51,125,295,625,1345,3125,7173,15625, 34269,78125,177153,390625,864315,1953125,4401655, 9765625,21706831,48828125,109676283,244140625, 544031251,1220703125,2736797215,6103515625, 13620096675,30517578125,68346531855] |