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A189846 as a simple table

na(n)
11
22
36
424
5114
6628
74062
830360
9251658
102308648
1123351268
12259031232
133091784268
1439697601392
15546982720164
168064677125440

[1,2,6,24,114,628,4062,30360,251658,2308648,
 23351268,259031232,3091784268,39697601392,
 546982720164,8064677125440]