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A087124 as a simple table

na(n)
01
13
26
315
437
594
6241
7623
81618
94215
1011001
1128746
1275169
13196651
14514606
151346879
163525565
179229062
1824160401
1963250167
20165586906
21433505383
221134920881
232971243730
247778788417
2520365086099
2653316412566
27139584058863

[1,3,6,15,37,94,241,623,1618,4215,11001,28746,
 75169,196651,514606,1346879,3525565,9229062,
 24160401,63250167,165586906,433505383,1134920881,
 2971243730,7778788417,20365086099,53316412566,
 139584058863]