Numbers whose prime factors are 2 and 7.

Terms

a(0) =14a(1) =28a(2) =56a(3) =98a(4) =112a(5) =196a(6) =224a(7) =392a(8) =448a(9) =686a(10) =784a(11) =896a(12) =1372a(13) =1568a(14) =1792a(15) =2744a(16) =3136a(17) =3584a(18) =4802a(19) =5488a(20) =6272a(21) =7168a(22) =9604a(23) =10976a(24) =12544a(25) =14336a(26) =19208a(27) =21952a(28) =25088a(29) =28672