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A291819 as a simple table

na(n)
11
24
324
4196
51944
621944
7272080
83627412
951288200
10761782104
1111805102064
12189901153112
133158767322992
1454165347282960
15955189096759776
1617289056525343716
17320678326091307448
186087009196570756488
19118109764108446889008
202340448760238788518488
2147324471620802426563376
22975739573623235107473968
2320500725692629852174532192
24438679922664144046444438488
259555430871381022848971028208

[1,4,24,196,1944,21944,272080,3627412,51288200,
 761782104,11805102064,189901153112,3158767322992,
 54165347282960,955189096759776,17289056525343716,
 320678326091307448,6087009196570756488,
 118109764108446889008,2340448760238788518488,
 47324471620802426563376,975739573623235107473968,
 20500725692629852174532192,
 438679922664144046444438488,
 9555430871381022848971028208]