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A074831 as a simple table

na(n)
13
220
3101
4508
53053
620053
7141772
81045600
98038954
1063830588
11518935134
124311185894

[3,20,101,508,3053,20053,141772,1045600,8038954,
 63830588,518935134,4311185894]