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A051861 as a simple table

na(n)
12
24
316
438
558
672
7148
8170
9178
10282
11388
12446
13512
14652
15656
16758
17836
18856
191514
201592
211648
221712
231906
241918
252034
262606
272758
284094
294936
305624
315758
325842
335924
346764
358188
3610570
3710922
3811072
3911482
4013082
4113972
4214626
4315212
4416018
4518986

[2,4,16,38,58,72,148,170,178,282,388,446,512,652,
 656,758,836,856,1514,1592,1648,1712,1906,1918,
 2034,2606,2758,4094,4936,5624,5758,5842,5924,6764,
 8188,10570,10922,11072,11482,13082,13972,14626,
 15212,16018,18986]