

A160751


a(n) is the smallest ndigit prime formed by appending a digit to a(n1); a(1)=6.


3




OFFSET

1,1


COMMENTS

There is no prime a(5) since all the integers from 61310 to 61319 are composite.


LINKS



MAPLE

A160751 := proc(n) option remember ; local d; if n =1 then 6; else for d from 1 to 9 by 2 do if isprime(10*procname(n1)+d) then RETURN( 10*procname(n1)+d ) ; fi; od: RETURN(1) ; fi; end: seq(A160751(n), n=1..10) ; # R. J. Mathar, May 26 2009


CROSSREFS



KEYWORD

base,easy,fini,full,nonn


AUTHOR



EXTENSIONS



STATUS

approved



