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A098661 as a simple table

na(n)
12
221
3134
4751
52628
611381
763898
8318941
91851114
1011138635
1159638094
12413291157
132550007678
1420721795665
15132517178106

[2,21,134,751,2628,11381,63898,318941,1851114,
 11138635,59638094,413291157,2550007678,
 20721795665,132517178106]