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A226835 as a simple table

na(n)
18
28
312
412
520
628
720
844
968
1092
1120
1244
1368
1492
15116
16402
17410
18418
19426
20434
21442
22266
23370
24474
25578
26682
27786
28890
29266
30370
31474
32578
33682
34786
35890
36994
371270
381414
391558
401702
411846
421990
432134
442278
452422
461394
471586
481778
491970
502162
512354
522546
532738
542930
553122

[8,8,12,12,20,28,20,44,68,92,20,44,68,92,116,402,
 410,418,426,434,442,266,370,474,578,682,786,890,
 266,370,474,578,682,786,890,994,1270,1414,1558,
 1702,1846,1990,2134,2278,2422,1394,1586,1778,1970,
 2162,2354,2546,2738,2930,3122]