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A031883 as a simple table

na(n)
12
24
32
44
52
66
74
86
92
104
116
126
132
1412
154
162
174
182
194
208
216
226
236
246
254
2612
272
284
292
306
3110
328
334
346
352
3618
374
382
396
404
416
428
434
448
454
462
474
4818
492
506
516
5210
532
544
558
566
574
5812
592
606
614
628
6310
648
654
666
6718
686
692
706
7110
726
736
746
752
764
7718
7812
7912
802
816
824
832
846
8516
866
872
8810
896
902
914
9212
936
9418
952
964
978

[2,4,2,4,2,6,4,6,2,4,6,6,2,12,4,2,4,2,4,8,6,6,6,6,
 4,12,2,4,2,6,10,8,4,6,2,18,4,2,6,4,6,8,4,8,4,2,4,
 18,2,6,6,10,2,4,8,6,4,12,2,6,4,8,10,8,4,6,18,6,2,
 6,10,6,6,6,2,4,18,12,12,2,6,4,2,6,16,6,2,10,6,2,4,
 12,6,18,2,4,8]