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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 36 |
| 4 | 900 |
| 5 | 75 |
| 6 | 3675 |
| 7 | 14700 |
| 8 | 1778700 |
| 9 | 300600300 |
| 10 | 150300150 |
| 11 | 450900450 |
| 12 | 130310230050 |
| 13 | 47041993048050 |
| 14 | 47041993048050 |
| 15 | 94083986096100 |
| 16 | 49770428644836900 |
| 17 | 12442607161209225 |
| 18 | 10464232622576958225 |
| 19 | 41856930490307832900 |
| 20 | 40224510201185827416900 |
[1,4,36,900,75,3675,14700,1778700,300600300, 150300150,450900450,130310230050,47041993048050, 47041993048050,94083986096100,49770428644836900, 12442607161209225,10464232622576958225, 41856930490307832900,40224510201185827416900] |