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A380415 as a simple table

na(n)
11
22
36
412
518
622
742
842
972
1020
1148
1218
1312
14108
1520
1642
1720
1842
1920
2036
2142
2242
2336
2436
2536
2642
2720
2842
2942
3036
3136
3242
3320
3448
3548
3618
3736
3836
3936
4036
4148
4248
4320
4448
4548
4636
4720
4848
4996
5020
5196
5236
5320
5420
5542
5636
5736
5820
5936
6036
6136
6220
6320
6436
6536
6620

[1,2,6,12,18,22,42,42,72,20,48,18,12,108,20,42,20,
 42,20,36,42,42,36,36,36,42,20,42,42,36,36,42,20,
 48,48,18,36,36,36,36,48,48,20,48,48,36,20,48,96,
 20,96,36,20,20,42,36,36,20,36,36,36,20,20,36,36,
 20]