A035868 - OEIS

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A035868 as a simple table

n	a(n)
0	1
1	1806
2	816312
3	164532018
4	18756445974
5	1378914676482
6	71082376011528
7	2723637332300766
8	80988226799441304
9	1932071264207861042
10	37971330014459062872
11	628214795343835069230
12	8908241443491168857610

[1,1806,816312,164532018,18756445974, 1378914676482,71082376011528,2723637332300766, 80988226799441304,1932071264207861042, 37971330014459062872,628214795343835069230, 8908241443491168857610]