Numbers k such that sopf(k) = sopf(k+2), where sopf(k) = A008472(k).

Terms

a(0) =2a(1) =340a(2) =845a(3) =950a(4) =1340a(5) =3724a(6) =5694a(7) =6102a(8) =7657a(9) =8991a(10) =9331a(11) =9709a(12) =10323a(13) =11388a(14) =11390a(15) =12460a(16) =15870a(17) =18912a(18) =19778a(19) =20882a(20) =21715a(21) =24732a(22) =26978a(23) =29052a(24) =29632a(25) =32428a(26) =33596a(27) =35028a(28) =38178a(29) =42718