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A099785 as a simple table

na(n)
01
12
24
38
418
548
6144
7448
81380
94152
1012224
1135456
12102024
13292768
14840416
152416384
166959504
1720069280
1857913536
19167158656
20482462752
211392319488
224017460224
2311590946816
2433439639616
2596470796672
26278311599616

[1,2,4,8,18,48,144,448,1380,4152,12224,35456,
 102024,292768,840416,2416384,6959504,20069280,
 57913536,167158656,482462752,1392319488,
 4017460224,11590946816,33439639616,96470796672,
 278311599616]