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A053294 as a simple table

na(n)
01
11
22
39
4170
557978
66722955416
790396259057770600841
816342967303279146791599896178138243550346

[1,1,2,9,170,57978,6722955416,
 90396259057770600841,
 16342967303279146791599896178138243550346]