1,1

Table of n, a(n) for n=1..46.

nextprime(5*13)=67 and nextprime(5)*nextprime(13)=5*13=65 then 13 is member because 67>65

(PARI) for(i=1, 150, if(nextprime(5*i)>nextprime(5)*nextprime(i), print1(i, ", ")))

Sequence in context: A171055 A117285 A100546 * A171057 A229786 A242122

Adjacent sequences: A117091 A117092 A117093 * A117095 A117096 A117097

easy,nonn

Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006

approved