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A056381 as a simple table

na(n)
12
22
34
48
510
632
726
884
998
10266
11214
121200
13702
142770
154328
168832
178230
1844086
1929202
20135744
21176720
22419654
23381490
242149068
251678244
265593294
277461064
2822550600
2919175158
30134386396
3171585134

[2,2,4,8,10,32,26,84,98,266,214,1200,702,2770,
 4328,8832,8230,44086,29202,135744,176720,419654,
 381490,2149068,1678244,5593294,7461064,22550600,
 19175158,134386396,71585134]