A267422 - OEIS

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A267422 as a simple table

n	a(n)
1	2
2	3
3	13
4	167
5	28219
6	796481281
7	634382430983400959
8	402441068740409482305343048128921493
9	161958813808922990180784918278423278413890512706478208244331277280870341

[2,3,13,167,28219,796481281,634382430983400959, 402441068740409482305343048128921493, 16195881380892299018078491827842327841389051270647\ 8208244331277280870341]