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A223781 as a simple table

na(n)
122
21066
341257
41467585
547578884
61441157406
741206839418
81126424633689
929624137360831
10754958917204216
1118727101503129461
12454102386552585234

[22,1066,41257,1467585,47578884,1441157406,
 41206839418,1126424633689,29624137360831,
 754958917204216,18727101503129461,
 454102386552585234]