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A304439 as a simple table

na(n)
00
12
20
36
40
510
60
714
80
918
1011
1113
1211
1317
1411
1521
1611
1725
1811
1929
2018
2120
2218
2324
2418
2528
2618
2732
2818
2936
3033
3135
3233
3339
3433
3543
3633
3747
3833
3951
4036
4138
4236
4342
4436
4546
4636
4750
4836
4954
5055
5157
5255
5361
5455
5565
5655
5769
5855
5973
6054
6156
6254
6360
6454
6564
6654
6768
6854
6972

[0,2,0,6,0,10,0,14,0,18,11,13,11,17,11,21,11,25,
 11,29,18,20,18,24,18,28,18,32,18,36,33,35,33,39,
 33,43,33,47,33,51,36,38,36,42,36,46,36,50,36,54,
 55,57,55,61,55,65,55,69,55,73,54,56,54,60,54,64,
 54,68,54,72]