The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 4 |
| 4 | 169 |
| 5 | 555025 |
| 6 | 14291007025 |
| 7 | 8480906296345283491681 |
| 8 | 3964171123687651228091479334301620432503354561 |
| 9 | 1124604806436444518574523753367158577376786150279857801748598100182341756509785760684694337921 |
[1,4,4,169,555025,14291007025, 8480906296345283491681, 3964171123687651228091479334301620432503354561, 11246048064364445185745237533671585773767861502798\ 57801748598100182341756509785760684694337921] |