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A374880 as a simple table

na(n)
00
11
218
3256
45400
5117649
63359232
7100000000
83643149312
9137858491849
106126151500000
11281474976710656
1214777503265582208
13799006685782884121
1448413259982080000000
153011361496339065143296
16206882551397716479442944
1714551915228366851806640625

[0,1,18,256,5400,117649,3359232,100000000,
 3643149312,137858491849,6126151500000,
 281474976710656,14777503265582208,
 799006685782884121,48413259982080000000,
 3011361496339065143296,206882551397716479442944,
 14551915228366851806640625]