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A159796 as a simple table

na(n)
10
20
34
44
50
64
720
816
90
104
1112
128
134
1428
1572
1648
170
184
1912
208
214
2228
2356
2432
254
2620
2732
2820
2936
30128
31256
3296
330
344
3512
368
374
3828
3956
4032
414
4220
4332
4420
4536
46128
47192
4896
494
5020

[0,0,4,4,0,4,20,16,0,4,12,8,4,28,72,48,0,4,12,8,4,
 28,56,32,4,20,32,20,36,128,256,96,0,4,12,8,4,28,
 56,32,4,20,32,20,36,128,192,96,4,20]