login

A027608 as a simple table

na(n)
01
19
249
3209
4769
52561
67937
723297
865537
9178177
10471041
111216513
123080193
137667713
1418808833
1545547521
16109051905
17258473985
18607125505
191414529025
203271557121
217516192769
2217163091969

[1,9,49,209,769,2561,7937,23297,65537,178177,
 471041,1216513,3080193,7667713,18808833,45547521,
 109051905,258473985,607125505,1414529025,
 3271557121,7516192769,17163091969]