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A181411 as a simple table

na(n)
14
218
355
4150
5379
6915
72146
84934
911080
1024833
1154476
12119091
13259432
14556700
151195135
162561094
175428597
1811488866
1924350993
2051296325
21107427025
22225330244
23472762497
24985966379
252049357779
264267962522
278887535983
2818431783744

[4,18,55,150,379,915,2146,4934,11080,24833,54476,
 119091,259432,556700,1195135,2561094,5428597,
 11488866,24350993,51296325,107427025,225330244,
 472762497,985966379,2049357779,4267962522,
 8887535983,18431783744]