A000610 - OEIS

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A000610 as a simple table

n	a(n)
1	1
2	2
3	6
4	42
5	4094
6	98210640
7	148947659711650464
8	872404773126414633407736134582136832
9	88627167739308536281147085615274891669779458770791192509009429292662497280

[1,2,6,42,4094,98210640,148947659711650464, 872404773126414633407736134582136832, 88627167739308536281147085615274891669779458770791\ 192509009429292662497280]