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A257252 as a simple table

na(n)
12
26
32
420
56
62
742
810
96
102
11110
1228
1320
146
152
16156
1722
1814
1910
206
212
22272
2352
2444
2528
2620
276
282
29342
3034
3126
3222
3314
3410
356
362
37506
3876
3968
4052
4144
4228
4320
446
452
46812
47138
48114
49102
5078
5166
5242
5310
546
552
56930
5758
5846
5938
6034
6126
6222
6314
6420
656
662
671332
68186
69174
70138
71114
72102
7378
7466
7542
7610
776
782

[2,6,2,20,6,2,42,10,6,2,110,28,20,6,2,156,22,14,
 10,6,2,272,52,44,28,20,6,2,342,34,26,22,14,10,6,2,
 506,76,68,52,44,28,20,6,2,812,138,114,102,78,66,
 42,10,6,2,930,58,46,38,34,26,22,14,20,6,2,1332,
 186,174,138,114,102,78,66,42,10,6,2]