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A270611 as a simple table

na(n)
10
20
344168712
438923001616
51749723617976
6176610474548304
74288332432901128
8139782884096635692
91969237211896886586
1029229202706222377392
11264578668721400632640
122322718464029360624340
1314967526923376689281208

[0,0,44168712,38923001616,1749723617976,
 176610474548304,4288332432901128,
 139782884096635692,1969237211896886586,
 29229202706222377392,264578668721400632640,
 2322718464029360624340,14967526923376689281208]