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A280620 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 1 |
| 6 | 100 |
| 7 | 161 |
| 8 | 1764 |
| 9 | 22001 |
| 10 | 49700 |
| 11 | 1649921 |
| 12 | 10057124 |
| 13 | 105372001 |
| 14 | 2044251300 |
| 15 | 12879413281 |
| 16 | 315936586084 |
| 17 | 3892292034001 |
| 18 | 49987743460900 |
| 19 | 1185027040858241 |
| 20 | 13878406361764644 |
| 21 | 321536491629592001 |
| 22 | 6033371812540110500 |
| 23 | 100320731761080176801 |
| 24 | 2657253524511363224804 |
| 25 | 47170890863193411630001 |
| 26 | 1155602674484930034008100 |
| 27 | 28284869824153625118984961 |
[1,0,1,4,1,100,161,1764,22001,49700,1649921, 10057124,105372001,2044251300,12879413281, 315936586084,3892292034001,49987743460900, 1185027040858241,13878406361764644, 321536491629592001,6033371812540110500, 100320731761080176801,2657253524511363224804, 47170890863193411630001,1155602674484930034008100, 28284869824153625118984961] |