A264787 - OEIS

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A264787 as a simple table

n	a(n)
0	1
1	1
2	7
3	2966
4	1310397193
5	579823814813639193
6	477464341236883456112705749206
7	1340767144321669800049265230788088027597024910
8	21516767919669856366796245458194341840929552797762722429430679631

[1,1,7,2966,1310397193,579823814813639193, 477464341236883456112705749206, 1340767144321669800049265230788088027597024910, 21516767919669856366796245458194341840929552797762\ 722429430679631]