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A028055 as a simple table

na(n)
01
123
2340
34130
445031
5459893
64504690
742928160
8401635861
93711270563
1034005047440
11309788905790
122811170579491
1325442007146033
14229842147512590
152073840099225020
1618696506927851921
17168462145714550303

[1,23,340,4130,45031,459893,4504690,42928160,
 401635861,3711270563,34005047440,309788905790,
 2811170579491,25442007146033,229842147512590,
 2073840099225020,18696506927851921,
 168462145714550303]