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A020531 as a simple table

na(n)
05
129
2305
34289
466305
51051649
616789505
7268484609
84295163905
968720263169
101099514773505
1117592198627329
12281475027042305
134503599828697089
1472057594843234305
151152921507828072449
1618446744086594453505
17295147905230892433409
184722366483075803643905

[5,29,305,4289,66305,1051649,16789505,268484609,
 4295163905,68720263169,1099514773505,
 17592198627329,281475027042305,4503599828697089,
 72057594843234305,1152921507828072449,
 18446744086594453505,295147905230892433409,
 4722366483075803643905]