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A178488 as a simple table

na(n)
12
24
39
410
511
612
715
825
931
1046
1153
1278
13318
14615
15955
161646
172669
182672
193515
207689

[2,4,9,10,11,12,15,25,31,46,53,78,318,615,955,
 1646,2669,2672,3515,7689]