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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A337924 Odd numbers, x, such that for all primes (p,q) such that x = p + 2q, x + 2p and x + 2q are composite. 0
 1, 3, 5, 59, 151 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The sequence is conjectured to be finite and full in A046927. The conjecture holds through 10^9. LINKS Table of n, a(n) for n=1..5. EXAMPLE For 59, (p,q) can be (13,23), (37,11), and (53,3). 59 + 2 * 13, 59 + 2 * 23, ... 59 + 2 * 3 are all composite, so 59 is in the sequence. CROSSREFS Cf. A046927. Sequence in context: A248923 A155121 A106914 * A049190 A174920 A158314 Adjacent sequences: A337921 A337922 A337923 * A337925 A337926 A337927 KEYWORD nonn,more AUTHOR Jud McCranie, Oct 09 2020 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 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)