login

A077315 as a simple table

na(n)
13
27
331
443
5127
6241
7967
85323
98191
10117127
11131071
12524287
137496191
1410307263
1577948683
16253755391
17428717761
18738197503
191714871047
202147483647
2116240345087
2227437936767
2342218553343
241965081755647
252414538435583
267024111812607
277860327022591
2816630113370111

[3,7,31,43,127,241,967,5323,8191,117127,131071,
 524287,7496191,10307263,77948683,253755391,
 428717761,738197503,1714871047,2147483647,
 16240345087,27437936767,42218553343,1965081755647,
 2414538435583,7024111812607,7860327022591,
 16630113370111]