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A271242 as a simple table

na(n)
10
20
376
433672
528240419
656147799704
7276127405321884
83458900532989376102
9112196911041806546125391
109529052847155132258919834684

[0,0,76,33672,28240419,56147799704,
 276127405321884,3458900532989376102,
 112196911041806546125391,
 9529052847155132258919834684]