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A275488 as a simple table

n a(n)
1 1
2 1
3 3
4 12
5 80
6 810
7 10857
8 174944
9 3243060
10 67859010
11 1586109305
12 41085509652
13 1170954002946
14 36469499267474
15 1233416773419495
16 45037748851872240
17 1766375778253548392
18 74067278799492363330
19 3306928891056821667045
20 156635771633727023132300

[1,1,3,12,80,810,10857,174944,3243060,67859010,
 1586109305,41085509652,1170954002946,
 36469499267474,1233416773419495,45037748851872240,
 1766375778253548392,74067278799492363330,
 3306928891056821667045,156635771633727023132300]

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Last modified October 18 03:22 EDT 2019. Contains 328135 sequences. (Running on oeis4.)