Numbers in A245385 where P, Q, R, and S are all distinct.

Terms

a(0) =164a(1) =195a(2) =265a(3) =498a(4) =1664a(5) =1995a(6) =2665a(7) =4847a(8) =4998a(9) =6545a(10) =7424a(11) =16664a(12) =19995a(13) =21775a(14) =24996a(15) =26665a(16) =43243a(17) =49998a(18) =86486a(19) =148480a(20) =166664a(21) =175150a(22) =199995a(23) =217775a(24) =249996a(25) =266665a(26) =368180a(27) =484847a(28) =499998a(29) =654545