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A055273 as a simple table

na(n)
01
18
223
361
4160
5419
61097
72872
87519
919685
1051536
11134923
12353233
13924776
142421095
156338509
1616594432
1743444787
18113739929
19297775000
20779585071
212040980213
225343355568
2313989086491
2436623903905
2595882625224
26251023971767
27657189290077
281720543898464

[1,8,23,61,160,419,1097,2872,7519,19685,51536,
 134923,353233,924776,2421095,6338509,16594432,
 43444787,113739929,297775000,779585071,2040980213,
 5343355568,13989086491,36623903905,95882625224,
 251023971767,657189290077,1720543898464]