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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A233360 Primes of the form L(k) + q(m) with k > 0 and m > 0, where L(k) is the k-th Lucas number (A000204), and q(.) is the strict partition function (A000009). 4

%I #7 Dec 08 2013 09:31:59

%S 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,79,83,101,

%T 103,107,127,131,149,151,193,199,211,223,227,229,233,239,241,251,257,

%U 263,269,307,337,347,349,379,397,401,419,421,449,463,487,523,541,571,643,647,661

%N Primes of the form L(k) + q(m) with k > 0 and m > 0, where L(k) is the k-th Lucas number (A000204), and q(.) is the strict partition function (A000009).

%C Conjecture: The sequence has infinitely many terms.

%C This follows from the conjecture in A233359.

%H Zhi-Wei Sun, <a href="/A233360/b233360.txt">Table of n, a(n) for n = 1..270</a>

%e a(1) = 2 since L(1) + q(1) = 1 + 1 = 2.

%e a(2) = 3 since L(1) + q(3) = 1 + 2 = 3.

%e a(3) = 5 since L(2) + q(3) = 3 + 2 = 5.

%t n=0

%t Do[Do[If[LucasL[j]>=Prime[m],Goto[aa],

%t Do[If[PartitionsQ[k]==Prime[m]-LucasL[j],

%t n=n+1;Print[n," ",Prime[m]];Goto[aa]];If[PartitionsQ[k]>Prime[m]-LucasL[j],Goto[bb]];Continue,{k,1,2*(Prime[m]-LucasL[j])}]];

%t Label[bb];Continue,{j,1,2*Log[2,Prime[m]]}];

%t Label[aa];Continue,{m,1,125}]

%Y Cf. A000009, A000040, A000032, A000204, A232504, A233307, A233346, A233359.

%K nonn

%O 1,1

%A _Zhi-Wei Sun_, Dec 08 2013

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)