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A063224 as a simple table

na(n)
10
22
34
44
56
68
78
810
912
1012
1114
1216
1316
1418
1520
1620
1722
1824
1924
2026
2128
2228
2330
2432
2532
2634
2736
2836
2938
3040
3140
3242
3344
3444
3546
3648
3748
3850
3952
4052
4154
4256
4356
4458
4560
4660
4762
4864
4964
5066

[0,2,4,4,6,8,8,10,12,12,14,16,16,18,20,20,22,24,
 24,26,28,28,30,32,32,34,36,36,38,40,40,42,44,44,
 46,48,48,50,52,52,54,56,56,58,60,60,62,64,64,66]