Sum of the digits of 5^(10^n).A124306Sum of the digits of 5^(10^n).Terms a(0) =5a(1) =40a(2) =283a(3) =3172a(4) =31117a(5) =313339a(6) =3145729a(7) =31472797a(8) =314531365External referencesoeis: A124306