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A117978 as a simple table

na(n)
10
26
328
466
5406
6666
7820
82080
92628
108646
1128680
1242486
1348828
1464620
1566066
1680200
1784666
18200028
19204480
20228826
21264628
22288420
23426426
24446040
25468028
26484620
27600060
28626640
29644680
30686206
31828828
32886446
332222886
342248260
352862028
362888406

[0,6,28,66,406,666,820,2080,2628,8646,28680,42486,
 48828,64620,66066,80200,84666,200028,204480,
 228826,264628,288420,426426,446040,468028,484620,
 600060,626640,644680,686206,828828,886446,2222886,
 2248260,2862028,2888406]