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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 54 |
| 1 | 144 |
| 2 | 900 |
| 3 | 2916 |
| 4 | 14112 |
| 5 | 59616 |
| 6 | 280908 |
| 7 | 1304100 |
| 8 | 5974254 |
| 9 | 28501416 |
| 10 | 133160508 |
| 11 | 641771424 |
| 12 | 3037720320 |
| 13 | 14671207872 |
| 14 | 70242548778 |
| 15 | 340125653664 |
| 16 | 1640652533460 |
| 17 | 7963315328520 |
| 18 | 38614602921930 |
[54,144,900,2916,14112,59616,280908,1304100, 5974254,28501416,133160508,641771424,3037720320, 14671207872,70242548778,340125653664, 1640652533460,7963315328520,38614602921930] |