Numbers k that divide 5^k + 2^k.

Terms

a(0) =1a(1) =7a(2) =49a(3) =343a(4) =2401a(5) =11179a(6) =16807a(7) =24059a(8) =78253a(9) =117649a(10) =168413a(11) =547771a(12) =823543a(13) =1178891a(14) =3834397a(15) =5764801a(16) =8252237a(17) =11812969a(18) =17852863a(19) =23649997a(20) =26840779a(21) =34591207a(22) =38422223a(23) =40353607a(24) =57765659a(25) =82690783a(26) =94527811a(27) =124970041a(28) =165549979a(29) =178539809