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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A166570 Numbers n such that 12*n+11 is not prime. 1
 2, 7, 9, 11, 12, 16, 17, 22, 23, 24, 26, 27, 30, 32, 33, 37, 42, 43, 44, 45, 47, 50, 51, 52, 55, 57, 58, 60, 62, 63, 64, 65, 66, 67, 70, 72, 74, 76, 77, 79, 82, 83, 86, 87, 88, 89, 92, 93, 94, 97, 99, 100, 102, 103, 105, 107, 110, 111, 112, 114, 115, 116, 117, 121, 122 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE Distribution of the terms in the following triangular array: *; *,*; *,2,*; *,*,*,*; *,*,*,*,*; *,*,*,*,11,*; *,*,*,*,*,*,*; *,*,9,*,*,*,*,*; *,7,*,*,*,*,*,26,*; *,*,*,*,*,*,*,*,*,*; *,*,*,*,*,24,*,*,*,*,*; *,*,*,*,22,*,*,*,*,*,47,*; etc. where * marks the non-integer values of (2*h*k + k + h - 5)/6 with h >= k >= 1. - MATHEMATICA Select[Range[0, 200], !PrimeQ[12 # + 11] &] (* Vincenzo Librandi, Jan 14 2013 *) PROG (Magma) [n: n in [0..150] | not IsPrime(12*n+11)]; // Vincenzo Librandi, Jan 14 2013 CROSSREFS Cf. A167057. Sequence in context: A034796 A047526 A221280 * A003668 A191263 A287359 Adjacent sequences: A166567 A166568 A166569 * A166571 A166572 A166573 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Oct 29 2009 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 11 02:28 EDT 2024. Contains 375813 sequences. (Running on oeis4.)