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A223426 as a simple table

na(n)
140
2248
31648
411168
576384
6524736
73613024
824906592
9171802144
101185459328
118181293568
1256467581344
13389761873696
142690371352800
1518570868118560
16128190601161344
17884876042394432
186108154188923040
1942163659349783904

[40,248,1648,11168,76384,524736,3613024,24906592,
 171802144,1185459328,8181293568,56467581344,
 389761873696,2690371352800,18570868118560,
 128190601161344,884876042394432,6108154188923040,
 42163659349783904]