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A321974 as a simple table

na(n)
01
12
29
354
4404
53598
637003
7430300
85571147
979358032
101231990840
1120684884234
12373208232229
137197079035318
14147658793214733
153210107125516682
1673690798853163884
171780718798351625094
1845171972342078432287
191199948465249850848608
2033305064129201851432591
21963911863209583899492324

[1,2,9,54,404,3598,37003,430300,5571147,79358032,
 1231990840,20684884234,373208232229,7197079035318,
 147658793214733,3210107125516682,
 73690798853163884,1780718798351625094,
 45171972342078432287,1199948465249850848608,
 33305064129201851432591,963911863209583899492324]