login

A057620 as a simple table

na(n)
17
231
3151
41741
51741
61741
719471
8118801
9148531
10148531
11406951
122339041
132339041
1451662593
1551662593
1673451737
17232301497
18450988159
191444257673
201444257673
211444257673
2224061965043
2324061965043
2443553959717
2543553959717

[7,31,151,1741,1741,1741,19471,118801,148531,
 148531,406951,2339041,2339041,51662593,51662593,
 73451737,232301497,450988159,1444257673,
 1444257673,1444257673,24061965043,24061965043,
 43553959717,43553959717]