7-smooth numbers using digits 2,3,5 and 7 only. Numbers using prime digits and having prime divisors < 10.

A085907

7-smooth numbers using digits 2,3,5 and 7 only. Numbers using prime digits and having prime divisors < 10.

Terms

    a(0) =2a(1) =3a(2) =5a(3) =7a(4) =25a(5) =27a(6) =32a(7) =35a(8) =72a(9) =75a(10) =225a(11) =252a(12) =375a(13) =525a(14) =735a(15) =2352a(16) =3375a(17) =25725a(18) =273375a(19) =2333772a(20) =52732233225

External references