Numbers k such that sopfr(k) = sopf(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k).

Terms

a(0) =5a(1) =27a(2) =77a(3) =714a(4) =836a(5) =948a(6) =1449a(7) =4185a(8) =4624a(9) =5405a(10) =5560a(11) =8476a(12) =8855a(13) =10175a(14) =16932a(15) =17080a(16) =18655a(17) =20450a(18) =20600a(19) =21183a(20) =26642a(21) =28809a(22) =31524a(23) =35631a(24) =37828a(25) =37881a(26) =40081a(27) =47544a(28) =48203a(29) =49240