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A098628 as a simple table

na(n)
01
12
212
3128
42224
556000
61880832
779985792
84161468928
9258415579648
1018793653411840
111576791247634432
12150745211441983488
1316253127712884269056
141959064946185017851904
15262002352633857351942144
1638624060984664180255621120
176240304185636529522872025088

[1,2,12,128,2224,56000,1880832,79985792,
 4161468928,258415579648,18793653411840,
 1576791247634432,150745211441983488,
 16253127712884269056,1959064946185017851904,
 262002352633857351942144,
 38624060984664180255621120,
 6240304185636529522872025088]