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A308044 as a simple table

na(n)
20
30
42
54
62
78
810
98
1014
1116
1214
1320
1418
1516
1626
1728
1826
1924
2034
2132
2238
2340
2438
2544
2642
2740
2850
2948
3046
3156
3258
3356
3454
3564
3662
3768
3870
3968
4066
4176
4274
4380
4478
4576
4686
4784
4882
4980
5094
5192
5298
53100
5498
55104
56106
57104
58110
59108
60106
61104
62102
63100
6498
65124

[0,0,2,4,2,8,10,8,14,16,14,20,18,16,26,28,26,24,
 34,32,38,40,38,44,42,40,50,48,46,56,58,56,54,64,
 62,68,70,68,66,76,74,80,78,76,86,84,82,80,94,92,
 98,100,98,104,106,104,110,108,106,104,102,100,98,
 124]