The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A349275 Semiprimes with only semiprime digits, each appearing at least once. 0
 469, 649, 694, 4469, 4694, 4699, 4946, 6499, 6649, 6694, 9446, 9466, 9469, 9946, 44669, 44966, 44969, 46469, 46946, 46969, 46994, 46999, 49466, 49649, 49694, 49699, 49969, 64469, 64649, 64669, 64949, 64994, 66469, 66494, 66694, 69449, 69469, 69494, 69694, 69949, 94469, 94669, 94699, 94969, 96449, 96494, 96649, 96946, 96949, 96994, 99646, 99649, 444694 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Each digits 4, 6, 9 occur at least once. Minimal difference is 3. LINKS Table of n, a(n) for n=1..53. PROG (PARI) is(n)=bigomega(n)==2 && Set(digits(n))==[4, 6, 9] \\ Charles R Greathouse IV, Nov 12 2021 CROSSREFS Cf. A001358. Subsequence of A107342. Sequence in context: A270259 A205407 A045305 * A250238 A234125 A259423 Adjacent sequences: A349272 A349273 A349274 * A349276 A349277 A349278 KEYWORD nonn,base AUTHOR Zak Seidov, Nov 12 2021 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 25 13:12 EDT 2023. Contains 365647 sequences. (Running on oeis4.)