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A231598 as a simple table

na(n)
10
26
367
4646
56130
658145
7558956
85432190
953071838
10520787464
115127052380
1250599825547
13500350977737
144955299345646

[0,6,67,646,6130,58145,558956,5432190,53071838,
 520787464,5127052380,50599825547,500350977737,
 4955299345646]