Practical numbers m with m-1 and m+1 both prime, and prime(m)-1 and prime(m)+1 both practical.

Terms

a(0) =4a(1) =522a(2) =1932a(3) =5100a(4) =6132a(5) =6552a(6) =8220a(7) =18312a(8) =18540a(9) =22110a(10) =29568a(11) =45342a(12) =70488a(13) =70950a(14) =92220a(15) =105360a(16) =109662a(17) =114600a(18) =116532a(19) =117192a(20) =123552a(21) =128982a(22) =131838a(23) =132762a(24) =136710a(25) =148302a(26) =149160a(27) =166848a(28) =177012a(29) =183438