Numbers that have exactly two exponents in their prime factorization that are equal to 4.

Terms

a(0) =1296a(1) =6480a(2) =9072a(3) =10000a(4) =14256a(5) =16848a(6) =22032a(7) =24624a(8) =29808a(9) =30000a(10) =32400a(11) =37584a(12) =38416a(13) =40176a(14) =45360a(15) =47952a(16) =50625a(17) =53136a(18) =55728a(19) =60912a(20) =63504a(21) =68688a(22) =70000a(23) =71280a(24) =76464a(25) =79056a(26) =84240a(27) =86832a(28) =90000a(29) =92016