Highly composite numbers of class 5 (see comment in A275239).

Terms

a(0) =13a(1) =21a(2) =44a(3) =56a(4) =100a(5) =108a(6) =270a(7) =450a(8) =560a(9) =576a(10) =600a(11) =1584a(12) =1848a(13) =2100a(14) =3240a(15) =4320a(16) =9072a(17) =9900a(18) =11088a(19) =14040a(20) =16800a(21) =28080a(22) =39600a(23) =40320a(24) =80640a(25) =92400a(26) =141120a(27) =143640a(28) =171360a(29) =287280