login

A356421 as a simple table

na(n)
13
215
361
4255
52043
64093
732765
865535
9262141
108388599
1133554397
12134217699
13268435453
141073741821
1517179869159
16137438953463
17274877906937
181099511627761
198796093022179
2017592186044409
2170368744177649
22140737488355323
23281474976710635
24562949953421243

[3,15,61,255,2043,4093,32765,65535,262141,8388599,
 33554397,134217699,268435453,1073741821,
 17179869159,137438953463,274877906937,
 1099511627761,8796093022179,17592186044409,
 70368744177649,140737488355323,281474976710635,
 562949953421243]