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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 404 |
| 3 | 5336 |
| 4 | 81104 |
| 5 | 1259576 |
| 6 | 19967936 |
| 7 | 320169512 |
| 8 | 5171292032 |
| 9 | 83900196944 |
| 10 | 1364972167264 |
| 11 | 22244133830384 |
| 12 | 362871115920320 |
| 13 | 5923247233768800 |
| 14 | 96723397586353984 |
| 15 | 1579802606359113536 |
| 16 | 25806819552006704128 |
[1,26,404,5336,81104,1259576,19967936,320169512, 5171292032,83900196944,1364972167264, 22244133830384,362871115920320,5923247233768800, 96723397586353984,1579802606359113536, 25806819552006704128] |