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A240321 as a simple table

na(n)
12
22
32
44
54
64
74
818
918
104
118
1244
13172
1444
158
168
17184
18866
19866
20184
218
2216
23444
247326
258456
267326
27444
2816
2916
301826
3135042
32143682
33143682
3435042
351826
3616
3732
384388
39291982
401352558
414934092
421352558
43291982
444388
4532
4632
4718022
481387224
4922643786

[2,2,2,4,4,4,4,18,18,4,8,44,172,44,8,8,184,866,
 866,184,8,16,444,7326,8456,7326,444,16,16,1826,
 35042,143682,143682,35042,1826,16,32,4388,291982,
 1352558,4934092,1352558,291982,4388,32,32,18022,
 1387224,22643786]