Terms of A068563 that are not terms of A124240.

Terms

a(0) =136a(1) =408a(2) =620a(3) =680a(4) =820a(5) =1224a(6) =1240a(7) =1314a(8) =2040a(9) =2312a(10) =2460a(11) =2480a(12) =2628a(13) =2856a(14) =3100a(15) =3400a(16) =3672a(17) =3924a(18) =3942a(19) =4100a(20) =4112a(21) =4656a(22) =4960a(23) =5304a(24) =5334a(25) =5784a(26) =6120a(27) =6200a(28) =6820a(29) =6936