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A129760 as a simple table

na(n)
10
20
32
40
54
64
76
80
98
108
1110
128
1312
1412
1514
160
1716
1816
1918
2016
2120
2220
2322
2416
2524
2624
2726
2824
2928
3028
3130
320
3332
3432
3534
3632
3736
3836
3938
4032
4140
4240
4342
4440
4544
4644
4746
4832
4948
5048
5150
5248
5352
5452
5554
5648
5756
5856
5958
6056
6160
6260
6362
640
6564
6664
6766
6864
6968
7068
7170
7264
7372
7472
7574

[0,0,2,0,4,4,6,0,8,8,10,8,12,12,14,0,16,16,18,16,
 20,20,22,16,24,24,26,24,28,28,30,0,32,32,34,32,36,
 36,38,32,40,40,42,40,44,44,46,32,48,48,50,48,52,
 52,54,48,56,56,58,56,60,60,62,0,64,64,66,64,68,68,
 70,64,72,72,74]