The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A121817 Numbers m such that 23 + 36*m*(m+1) is prime. 0

%I #8 May 26 2019 01:54:00

%S 0,2,4,5,7,12,14,15,27,30,32,34,40,47,49,50,57,60,62,67,72,75,82,85,

%T 89,95,97,102,104,105,109,110,119,135,140,162,175,177,180,182,187,189,

%U 194,200,214,219,222,225,235,239,242,244,247,254,257,259,265,277,279,280

%N Numbers m such that 23 + 36*m*(m+1) is prime.

%C All terms of A121250 (numbers n such that n^2+14 is prime) are of the form n = 3+6*m, m = 0, 1, .... Hence n^2 + 14 = 23 + 36*m(m+1): these values of m are in this sequence.

%t Select[Range[0,300], PrimeQ[23 + 36*#(1+# ]&]

%o (PARI) select( is_A121817(n)=isprime(23+36*(n+1)*n), [0..299]) \\ _M. F. Hasler_, May 25 2019

%Y Cf. A121250.

%K nonn

%O 1,2

%A _Zak Seidov_, Sep 09 2006

%E Edited by _M. F. Hasler_, May 25 2019

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 May 22 09:57 EDT 2024. Contains 372745 sequences. (Running on oeis4.)