A340259 - OEIS

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A340259 as a simple table

n	a(n)
1	1
2	0
3	14
4	870
5	18796230
6	28634752793916486
7	187118328452563149209991044344449606
8	22533823529098462258163079522899558179092788838542277982316450977506091590

[1,0,14,870,18796230,28634752793916486, 187118328452563149209991044344449606, 22533823529098462258163079522899558179092788838542\ 277982316450977506091590]