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A334499 as a simple table

na(n)
12
22
36
48
530
618
7126
840
9504
10430
11979
12102
13819
142198
156820
166016
1778812
187812
19183920
20142580
21352884
22122870
231630792
24185040
252777040
26312156
2781688176
28304913
29463347935
305921860
311211061438
3226636800
333315517623
3440012662
3524752893585
36135322524
3740583131393
38535150200
39132932362849
403936823600

[2,2,6,8,30,18,126,40,504,430,979,102,819,2198,
 6820,6016,78812,7812,183920,142580,352884,122870,
 1630792,185040,2777040,312156,81688176,304913,
 463347935,5921860,1211061438,26636800,3315517623,
 40012662,24752893585,135322524,40583131393,
 535150200,132932362849,3936823600]