Numbers k such that k and k+2 are both A000120-perfect numbers (A175522).

Terms

a(0) =123a(1) =219a(2) =695a(3) =1261a(4) =1851a(5) =1943a(6) =3543a(7) =5963a(8) =7031a(9) =7613a(10) =7769a(11) =7861a(12) =10081a(13) =11357a(14) =11629a(15) =12083a(16) =13211a(17) =13791a(18) =14185a(19) =15699a(20) =15835a(21) =15929a(22) =16241a(23) =18649a(24) =20197a(25) =20989a(26) =22521a(27) =23449a(28) =23521a(29) =23963