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A247654 as a simple table

na(n)
14
26
38
48
512
610
716
810
912
1014
1124
1212
1328
1418
1516
1612
1736
1814
1940
2016
2120
2226
2348
2414
2520
2630
2724
2820
2960
3018
3164
3214
3328
3438
3524
3616
3776
3842
3932
4018
4184
4222
4388
4428
4528
4650
4796
4816
4928
5022
5140
5232
53108
5418
5532
5622
5744
5862
59120
6020
61124
6266
6332
6416
6536

[4,6,8,8,12,10,16,10,12,14,24,12,28,18,16,12,36,
 14,40,16,20,26,48,14,20,30,24,20,60,18,64,14,28,
 38,24,16,76,42,32,18,84,22,88,28,28,50,96,16,28,
 22,40,32,108,18,32,22,44,62,120,20,124,66,32,16,
 36]