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A267609 as a simple table

na(n)
01
17
221
3127
4381
51911
65461
732767
898301
9491511
101408981
118355711
1225001341
13125269879
14357913941
152147483647
166442450941
1732212254711
1892341796821
19547608330111
201638530022781
218209829984119
2223456963876181
23140735340838911
24422201727483901

[1,7,21,127,381,1911,5461,32767,98301,491511,
 1408981,8355711,25001341,125269879,357913941,
 2147483647,6442450941,32212254711,92341796821,
 547608330111,1638530022781,8209829984119,
 23456963876181,140735340838911,422201727483901]