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A088920 as a simple table

na(n)
12
250
31682
457122
51940450
665918162
72239277042
876069501250
92584123765442
1087784138523762
112982076586042450
12101302819786919522
133441313796169221282
14116903366249966604050
153971273138702695316402

[2,50,1682,57122,1940450,65918162,2239277042,
 76069501250,2584123765442,87784138523762,
 2982076586042450,101302819786919522,
 3441313796169221282,116903366249966604050,
 3971273138702695316402]