Triples of practical numbers: numbers n such that n-2, n, n+2 are all practical numbers.

Terms

a(0) =4a(1) =6a(2) =18a(3) =30a(4) =198a(5) =306a(6) =462a(7) =702a(8) =1482a(9) =2550a(10) =3330a(11) =4422a(12) =5778a(13) =6102a(14) =6498a(15) =9042a(16) =11178a(17) =11778a(18) =14418a(19) =15498a(20) =17298a(21) =17442a(22) =19458a(23) =20862a(24) =21582a(25) =22878a(26) =23322a(27) =23550a(28) =25230a(29) =26622