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A166951 as a simple table

na(n)
01
112
2132
31452
415972
5175692
61932612
721258732
8233846052
92572306572
1028295372292
11311249095212
123423740047332
1337661140520586
14414272545725720
154556998002975000
1650126978032637880
17551396758358058360

[1,12,132,1452,15972,175692,1932612,21258732,
 233846052,2572306572,28295372292,311249095212,
 3423740047332,37661140520586,414272545725720,
 4556998002975000,50126978032637880,
 551396758358058360]