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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A117815 Composite numbers at least one of whose decimal digits is prime. 3
 12, 15, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 42, 45, 50, 51, 52, 54, 55, 56, 57, 58, 62, 63, 65, 70, 72, 74, 75, 76, 77, 78, 82, 85, 87, 92, 93, 95, 102, 105, 112, 115, 117, 120, 121, 122, 123, 124, 125, 126, 128, 129, 130, 132, 133 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Michael S. Branicky, Table of n, a(n) for n = 1..10000 PROG (Python) from sympy import isprime def ok(n): return set(str(n)) & set("2357") != set() and not isprime(n) print([k for k in range(134) if ok(k)]) # Michael S. Branicky, Dec 15 2021 CROSSREFS Supersequence of A117815. Cf. A000040, A002808. Sequence in context: A115349 A196224 A163657 * A154390 A346608 A156683 Adjacent sequences: A117812 A117813 A117814 * A117816 A117817 A117818 KEYWORD base,easy,nonn AUTHOR Giovanni Teofilatto, Apr 30 2006 EXTENSIONS Corrected by Giovanni Teofilatto, May 12 2006 Name edited by Michael S. Branicky, Dec 15 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 April 17 05:47 EDT 2024. Contains 371756 sequences. (Running on oeis4.)