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A181542 as a simple table

na(n)
12
23
34
411
512
618
720
830
935
1047
11108
12113
13118
14127
15136
16162
17165
18212
19502
20656
211131
221560
231620
241966
252293
264184
275568

[2,3,4,11,12,18,20,30,35,47,108,113,118,127,136,
 162,165,212,502,656,1131,1560,1620,1966,2293,4184,
 5568]