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A053605 as a simple table

na(n)
11
20
33
48
5135
61164
721035
8322832
97040943
10153153620
114048737099
12112389077976
133537768793559
14118535631544316
154353324736520955
16170245846476629024
177163230987527864543
18319708454444016133284

[1,0,3,8,135,1164,21035,322832,7040943,153153620,
 4048737099,112389077976,3537768793559,
 118535631544316,4353324736520955,
 170245846476629024,7163230987527864543,
 319708454444016133284]