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A155228 as a simple table

na(n)
31
413
537
6106
71005
810898
9103861
101556609
1133473058
12935408536
1332508382331
141526329950979
1597248083092281
168153227821911786

[1,13,37,106,1005,10898,103861,1556609,33473058,
 935408536,32508382331,1526329950979,
 97248083092281,8153227821911786]