Practical numbers k such that k^4 + 2 is also practical.

Terms

a(0) =2a(1) =16a(2) =28a(3) =160a(4) =280a(5) =512a(6) =520a(7) =644a(8) =820a(9) =1040a(10) =1204a(11) =1640a(12) =2000a(13) =2072a(14) =2288a(15) =2720a(16) =2920a(17) =3416a(18) =3800a(19) =3976a(20) =4648a(21) =4664a(22) =4736a(23) =5312a(24) =5600a(25) =6136a(26) =6188a(27) =6496a(28) =6968a(29) =7936