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A239234 as a simple table

na(n)
00
12
26
317
436
599
6249
7651
81774
95018
1013587
1139170
12115968
13323061
14953827
152870277
168165537
1724569821

[0,2,6,17,36,99,249,651,1774,5018,13587,39170,
 115968,323061,953827,2870277,8165537,24569821]