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A338986 as a simple table

na(n)
01
11
22
34
44
58
612
74
812
912
1016
1120
1228
1312
1412
1560
1616
1720
1840
1948
2048
2152
2244
2376
2452
2572
2680
2768
2860
29136
30148
31152
3272
33216
34116
35140
36116
37184
38408
39176
40404
41288
42412
43440
44356
45384
46464
47256
48704
49444
50812
51560
52348
53904
54800
551088
56628
57716
58868

[1,1,2,4,4,8,12,4,12,12,16,20,28,12,12,60,16,20,
 40,48,48,52,44,76,52,72,80,68,60,136,148,152,72,
 216,116,140,116,184,408,176,404,288,412,440,356,
 384,464,256,704,444,812,560,348,904,800,1088,628,
 716,868]