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A006998 as a simple table

na(n)
00
11
22
34
46
58
612
714
816
924
1026
1128
1232
1340
1448
1552
1654
1756
1864
1972
2080
2196
22100
23104
24108
25110
26112
27128
28136
29144
30160
31176
32192
33200
34204
35208
36216
37218
38220
39224
40240
41256
42272
43280
44288
45320
46336
47352
48384
49392
50400
51408
52412
53416
54432
55434
56436
57440

[0,1,2,4,6,8,12,14,16,24,26,28,32,40,48,52,54,56,
 64,72,80,96,100,104,108,110,112,128,136,144,160,
 176,192,200,204,208,216,218,220,224,240,256,272,
 280,288,320,336,352,384,392,400,408,412,416,432,
 434,436,440]