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A305693 as a simple table

na(n)
01
12
254
3852
412550
5183356
62698108
740090728
8600970566
99074671980
10137844584020
112104090834456
1232247569822364
13495918392331992
147648690018326840
15118264579157865424
161832624131015069254
1728453041434367110220
18442512540108817131364

[1,2,54,852,12550,183356,2698108,40090728,
 600970566,9074671980,137844584020,2104090834456,
 32247569822364,495918392331992,7648690018326840,
 118264579157865424,1832624131015069254,
 28453041434367110220,442512540108817131364]