A306207 - OEIS

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A306207 as a simple table

n	a(n)
0	1
1	2
2	19
3	9745
4	768211081
5	17406784944114721
6	179762725526880242306609281
7	1230064011299573560897489169488350806401
8	7660929590740297929124296619236388608530015362840364161

[1,2,19,9745,768211081,17406784944114721, 179762725526880242306609281, 1230064011299573560897489169488350806401, 76609295907402979291242966192363886085300153628403\ 64161]