Numbers that appear in both A278909 and A280967 but not in A280971.

Terms

a(0) =765a(1) =1275a(2) =1467a(3) =1503a(4) =1515a(5) =1695a(6) =2910a(7) =2975a(8) =3066a(9) =3423a(10) =4335a(11) =4539a(12) =4605a(13) =4862a(14) =4923a(15) =4947a(16) =4975a(17) =5110a(18) =5295a(19) =5335a(20) =5375a(21) =5559a(22) =5787a(23) =5790a(24) =5835a(25) =5885a(26) =6069a(27) =6123a(28) =6495a(29) =6735