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A172798 as a simple table

na(n)
1887226868605
21771064195990555279483745075
37745310191767932461627415566004172302489000
447307220244039925184729002585595148532177882871899513973875

[887226868605,1771064195990555279483745075,
 7745310191767932461627415566004172302489000,
 47307220244039925184729002585595148532177882871899\
 513973875]