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A167726 as a simple table

na(n)
127
2729
312167
419683
568921
6148877
7185193
8328509
9658503
10704969
11970299
121030301
131367631
142248091
153581577
165000211
179663597
1815813251
1917779581
2019034163

[27,729,12167,19683,68921,148877,185193,328509,
 658503,704969,970299,1030301,1367631,2248091,
 3581577,5000211,9663597,15813251,17779581,
 19034163]