Numbers of the form ab such that uphi(ab) = a*b where ab is the concatenation of a and b.

Terms

a(0) =18a(1) =26a(2) =68a(3) =87a(4) =154a(5) =165a(6) =209a(7) =572a(8) =846a(9) =1434a(10) =4840a(11) =5476a(12) =5828a(13) =5936a(14) =6499a(15) =6572a(16) =7772a(17) =8540a(18) =8727a(19) =10088a(20) =10864a(21) =11772a(22) =12867a(23) =15088a(24) =20099a(25) =20584a(26) =20881a(27) =21672a(28) =22440a(29) =27348