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A123947 as a simple table

na(n)
10
21
33
49
529
690
7284
8890
92797
108780
1127574
1286581
13271881
14853732
152680833
168418132
1726433983
1883005929
19260648825
20818469251
212570093890
228070410030
2325342077544
2479577232067
25249882270390
26784660981474
272463931734897

[0,1,3,9,29,90,284,890,2797,8780,27574,86581,
 271881,853732,2680833,8418132,26433983,83005929,
 260648825,818469251,2570093890,8070410030,
 25342077544,79577232067,249882270390,784660981474,
 2463931734897]