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A252222 as a simple table

na(n)
1368
21028
33066
47724
522256
670284
7219824
8675264
92072804
106383492
1119670396
1260581792
13186548780
14574478144
151769185920
165448417444
1716778894996
1851672129164
19159129275664
20490053971084
211509168106704
224647627251072

[368,1028,3066,7724,22256,70284,219824,675264,
 2072804,6383492,19670396,60581792,186548780,
 574478144,1769185920,5448417444,16778894996,
 51672129164,159129275664,490053971084,
 1509168106704,4647627251072]