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A220311 as a simple table

na(n)
17
2155
33024
450451
5822483
613221364
7211771497
83387519403
954157226596
10865646398021
1113835289533051
12221116601005587
133533854122337635
1456477253797259894
15902604704988499209
1614425180099380063835

[7,155,3024,50451,822483,13221364,211771497,
 3387519403,54157226596,865646398021,
 13835289533051,221116601005587,3533854122337635,
 56477253797259894,902604704988499209,
 14425180099380063835]