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A006539 as a simple table

na(n)
01
12
24
35
46
512
618
720
830
946
1060
1162
1272
1389
14105
15113
16117
17119
18120
19241
20483
21633
22647
23654
241074
251752
261806
273050
283609
293611
303612
315459
325460
337976
347999
358005
368008
3710076
3816379

[1,2,4,5,6,12,18,20,30,46,60,62,72,89,105,113,117,
 119,120,241,483,633,647,654,1074,1752,1806,3050,
 3609,3611,3612,5459,5460,7976,7999,8005,8008,
 10076,16379]