Numbers n such that phi(n)=d_1!!*d_2!!*...*d_k!! where d_1 d_2 ... d_k is the decimal expansion of n.

A139408

Numbers n such that phi(n)=d_1!!*d_2!!*...*d_k!! where d_1 d_2 ... d_k is the decimal expansion of n.

Terms

    a(0) =1a(1) =260a(2) =450a(3) =543a(4) =630a(5) =1164a(6) =2080a(7) =3534a(8) =3640a(9) =4525a(10) =5425a(11) =11176a(12) =13365a(13) =15407a(14) =18333a(15) =24056a(16) =24552a(17) =25064a(18) =25452a(19) =26352a(20) =30660a(21) =37324a(22) =45136a(23) =46160a(24) =46325a(25) =49321a(26) =51742a(27) =52080a(28) =54540a(29) =67122

External references