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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 650 |
| 3 | 16250 |
| 4 | 406250 |
| 5 | 10155925 |
| 6 | 253890000 |
| 7 | 6347047200 |
| 8 | 158671110000 |
| 9 | 3966651000000 |
| 10 | 99163106355300 |
| 11 | 2478998445300000 |
| 12 | 61972980856207200 |
| 13 | 1549275016079700000 |
| 14 | 38730637808401500000 |
| 15 | 968235006358878382800 |
[1,26,650,16250,406250,10155925,253890000, 6347047200,158671110000,3966651000000, 99163106355300,2478998445300000,61972980856207200, 1549275016079700000,38730637808401500000, 968235006358878382800] |