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A256487 as a simple table

na(n)
12
24
30
44
510
618
716
836
928
1048
1178
1280
1362
1490
1576
16110
17134
18158
19200
20220
21224
22216
23236
24280
25308
26312
27262
28314
29328
30402
31430
32424
33438
34488
35506
36538
37414
38510
39642
40620
41680
42648
43656
44690
45666
46684
47730
48790
49742
50840
51844
52862
53916
54976
551004
561092
571072
581112
591054
601166
611176
621184
631292

[2,4,0,4,10,18,16,36,28,48,78,80,62,90,76,110,134,
 158,200,220,224,216,236,280,308,312,262,314,328,
 402,430,424,438,488,506,538,414,510,642,620,680,
 648,656,690,666,684,730,790,742,840,844,862,916,
 976,1004,1092,1072,1112,1054,1166,1176,1184,1292]