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A187827 as a simple table

na(n)
01
11
25
336
4325
53468
642519
7590268
89201740
9160150252
103095440553
1166068011710
121547572760559
1339529002357409
141094096683131616
1532622859912512090
161042350065213470532
1735521574976088978133
181285782300453328211074
1949256935742079848796102

[1,1,5,36,325,3468,42519,590268,9201740,160150252,
 3095440553,66068011710,1547572760559,
 39529002357409,1094096683131616,32622859912512090,
 1042350065213470532,35521574976088978133,
 1285782300453328211074,49256935742079848796102]