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A001770 as a simple table

na(n)
12
24
38
410
512
614
718
832
948
1054
1172
12148
13184
14248
15270
16274
17420
181340
191438
201522
211638
221754
231884
242014
252170
262548
272622
282652
292704
3013510
3121738
3225624
3341934
3451478
3552540
3653230
37172300
38245728
39350028
401194164

[2,4,8,10,12,14,18,32,48,54,72,148,184,248,270,
 274,420,1340,1438,1522,1638,1754,1884,2014,2170,
 2548,2622,2652,2704,13510,21738,25624,41934,51478,
 52540,53230,172300,245728,350028,1194164]