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A188478 as a simple table

na(n)
01
11
21
32
44
511
633
7116
8456
91999
109623
1150603
12288287
131769352
1411636669
1581652911
16608857325
174807873069
1840080193414
19351751992542
203241754135966
2131301851579056
22316012152140592
233329322705562603
2436539984716325869
25417102552119591395
264944630222121834001
2760791493200390178470

[1,1,1,2,4,11,33,116,456,1999,9623,50603,288287,
 1769352,11636669,81652911,608857325,4807873069,
 40080193414,351751992542,3241754135966,
 31301851579056,316012152140592,3329322705562603,
 36539984716325869,417102552119591395,
 4944630222121834001,60791493200390178470]