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A143555 as a simple table

na(n)
01
11
24
38
428
580
6308
7984
83980
913472
1056164
11197032
12838396
133013872
1413015188
1547624568
16207971436
17771336512
183397886660
1912736715592
2056502898140
21213618833808
22953139545076
233629043226392
2416270547827020
2562317467147744

[1,1,4,8,28,80,308,984,3980,13472,56164,197032,
 838396,3013872,13015188,47624568,207971436,
 771336512,3397886660,12736715592,56502898140,
 213618833808,953139545076,3629043226392,
 16270547827020,62317467147744]