A340185 - OEIS

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A340185 as a simple table

n	a(n)
0	1
1	1
2	15
3	2639
4	5100561
5	105518291153
6	23067254643457375
7	52901008815129395889375
8	1266973371422697144030728637409
9	315937379766837559600972497421046382689
10	818563964325891485548944567913851815851212484079

[1,1,15,2639,5100561,105518291153, 23067254643457375,52901008815129395889375, 1266973371422697144030728637409, 315937379766837559600972497421046382689, 818563964325891485548944567913851815851212484079]