Numbers k such that A026166(k) = A026142(k) - 2.

Terms

a(0) =2a(1) =6a(2) =12a(3) =18a(4) =21a(5) =30a(6) =36a(7) =39a(8) =48a(9) =54a(10) =57a(11) =63a(12) =66a(13) =75a(14) =84a(15) =90a(16) =93a(17) =102a(18) =108a(19) =111a(20) =117a(21) =120a(22) =129a(23) =138a(24) =144a(25) =147a(26) =156a(27) =162a(28) =165a(29) =171