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A355126 as a simple table

na(n)
01
11
24
354
41936
5168780
634360128
715979581632
816740281020160
939091514910283872
10201702609432140369280
112281926772696486970224192
1256217269029941735581289119232
132997472083791372184890466743907712
14344025706673467887482938899075885442048

[1,1,4,54,1936,168780,34360128,15979581632,
 16740281020160,39091514910283872,
 201702609432140369280,2281926772696486970224192,
 56217269029941735581289119232,
 2997472083791372184890466743907712,
 344025706673467887482938899075885442048]