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A238365 as a simple table

na(n)
12
24
36
46
54
66
78
810
96
104
116
128
1310
1410
158
1610
1712
1814
1910
208
2110
2212
2314
2414
2512
2614
2716
2818
2914
3012
3114
3216
3318
3418
3516
3618
3720
3822
3918
407
419
4211
4313
4413
4511
4613
4715
4817
4913
503
515
527
539
549
557
569
5711
5813
599
607
619
6211
6313
6413
6511
6613
6715
6817
6913
7011
7113
7215

[2,4,6,6,4,6,8,10,6,4,6,8,10,10,8,10,12,14,10,8,
 10,12,14,14,12,14,16,18,14,12,14,16,18,18,16,18,
 20,22,18,7,9,11,13,13,11,13,15,17,13,3,5,7,9,9,7,
 9,11,13,9,7,9,11,13,13,11,13,15,17,13,11,13,15]