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A020647 as a simple table

na(n)
01
14
28
312
416
516
620
724
828
932
1032
1136
1240
1342
1446
1548
1652
1756
1858
1962
2064
2164
2268
2372
2476
2580
2680
2784
2888
2992
3096
3196
32100
33104
34106
35110
36112
37116
38120
39122
40126
41128
42128
43132
44136
45138
46142
47144
48148
49152
50154
51158
52160
53162
54166
55168
56172
57176
58178
59182
60184
61188

[1,4,8,12,16,16,20,24,28,32,32,36,40,42,46,48,52,
 56,58,62,64,64,68,72,76,80,80,84,88,92,96,96,100,
 104,106,110,112,116,120,122,126,128,128,132,136,
 138,142,144,148,152,154,158,160,162,166,168,172,
 176,178,182,184,188]