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A047975 as a simple table

na(n)
02
14
22
34
46
56
64
72
84
94
102
116
124
136
144
154
166
174
182
192
204
212
224
236
246
2510
268
274
284
294
302
314
324
332
346
356
364
372
388
396
4012
412
422
438
4410
452
4612
476
484
494
5014
512
5218
5316
546
5510
564
578
584
592
608
6112
622
638
6412
6510
666
672
686

[2,4,2,4,6,6,4,2,4,4,2,6,4,6,4,4,6,4,2,2,4,2,4,6,
 6,10,8,4,4,4,2,4,4,2,6,6,4,2,8,6,12,2,2,8,10,2,12,
 6,4,4,14,2,18,16,6,10,4,8,4,2,8,12,2,8,12,10,6,2,
 6]