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| n | a(n) |
|---|---|
| 1 | 476 |
| 2 | 2900 |
| 3 | 18048 |
| 4 | 122532 |
| 5 | 849760 |
| 6 | 6162980 |
| 7 | 45072784 |
| 8 | 336800596 |
| 9 | 2522650128 |
| 10 | 19088198500 |
| 11 | 144496686736 |
| 12 | 1099235735220 |
| 13 | 8361799506432 |
| 14 | 63763278750940 |
| 15 | 486171217676608 |
| 16 | 3711468980550724 |
| 17 | 28330997175625424 |
| 18 | 216398588504027700 |
[476,2900,18048,122532,849760,6162980,45072784, 336800596,2522650128,19088198500,144496686736, 1099235735220,8361799506432,63763278750940, 486171217676608,3711468980550724, 28330997175625424,216398588504027700] |