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A334001 as a simple table

na(n)
12
22
34
44
56
68
78
810
910
1012
1116
1212
1316
1414
1518
1612
1722
1824
1920
2016
2122
2222
2324
2426
2522
2626
2728
2816
2930
3030
3136
3224
3334
3436
3532
3630
3730
3844
3942
4044
4138
4244
4350
4434
4544
4646
4754
4836
4950
5060
5156
5230
5350
5456
5556
5646
5754
5856
5968
6036
6168
6254
6356
6446
6544
6666
6754

[2,2,4,4,6,8,8,10,10,12,16,12,16,14,18,12,22,24,
 20,16,22,22,24,26,22,26,28,16,30,30,36,24,34,36,
 32,30,30,44,42,44,38,44,50,34,44,46,54,36,50,60,
 56,30,50,56,56,46,54,56,68,36,68,54,56,46,44,66,
 54]