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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 324 |
| 3 | 2900 |
| 4 | 20149 |
| 5 | 115805 |
| 6 | 572975 |
| 7 | 2507895 |
| 8 | 9904050 |
| 9 | 35818770 |
| 10 | 120016066 |
| 11 | 376029250 |
| 12 | 1110031585 |
| 13 | 3106677225 |
| 14 | 8286768736 |
| 15 | 21161266240 |
| 16 | 51931463950 |
| 17 | 122883804990 |
| 18 | 281186004075 |
| 19 | 623785796595 |
| 20 | 1344621849285 |
| 21 | 2822018693325 |
| 22 | 5776896838830 |
| 23 | 11553274693950 |
[1,25,324,2900,20149,115805,572975,2507895, 9904050,35818770,120016066,376029250,1110031585, 3106677225,8286768736,21161266240,51931463950, 122883804990,281186004075,623785796595, 1344621849285,2822018693325,5776896838830, 11553274693950] |