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A005644 as a simple table

na(n)
41
526
61768
7225096
851725352
921132802544
1015463799747936
1120604021770403328
1250928019401158515328
13237644423948928994197504
142125373296900166452199861760
1536884133903194627014531723872256

[1,26,1768,225096,51725352,21132802544,
 15463799747936,20604021770403328,
 50928019401158515328,237644423948928994197504,
 2125373296900166452199861760,
 36884133903194627014531723872256]