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A266467 as a simple table

na(n)
12
27
328
4137
5735
64074
722128
8113677
9544142
102417707
119991874
1238585111
13139969744
14479482160
151558677189
164829461991
1714318767180
1840765225229
19111787710303
20296081929163
21759290568963
221889449601320
234571408444209

[2,7,28,137,735,4074,22128,113677,544142,2417707,
 9991874,38585111,139969744,479482160,1558677189,
 4829461991,14318767180,40765225229,111787710303,
 296081929163,759290568963,1889449601320,
 4571408444209]