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A053940 as a simple table

na(n)
12
222
362
4939938
5290427872
6620035792022
7291278798292022
8665949276513522
96952948212333013522
105906300402396058566810062

[2,22,62,939938,290427872,620035792022,
 291278798292022,665949276513522,
 6952948212333013522,5906300402396058566810062]