Sum of the digits of 5^(2^n).

Terms

a(0) =5a(1) =7a(2) =13a(3) =25a(4) =58a(5) =106a(6) =166a(7) =430a(8) =805a(9) =1510a(10) =3190a(11) =6415a(12) =12595a(13) =25963a(14) =51457a(15) =102283a(16) =205744a(17) =412918a(18) =825961a(19) =1649851a(20) =3297091a(21) =6593902a(22) =13191169a(23) =26388961a(24) =52772314a(25) =105541459a(26) =211045936