Numbers of the form 5^i*7^j with i, j >= 0.

Terms

a(0) =1a(1) =5a(2) =7a(3) =25a(4) =35a(5) =49a(6) =125a(7) =175a(8) =245a(9) =343a(10) =625a(11) =875a(12) =1225a(13) =1715a(14) =2401a(15) =3125a(16) =4375a(17) =6125a(18) =8575a(19) =12005a(20) =15625a(21) =16807a(22) =21875a(23) =30625a(24) =42875a(25) =60025a(26) =78125a(27) =84035a(28) =109375a(29) =117649