OFFSET
1,2
COMMENTS
A139368(219) = -4.
MAPLE
From R. J. Mathar, Apr 25 2010: (Start)
A102342 := proc(n) option remember; if n = 1 then 0; else for a from procname(n-1)+1 do if isprime(10*a+7) then return a; end if; end do: end if; end proc:
A024912 := proc(n) option remember; if n = 1 then 1; else for a from procname(n-1)+1 do if isprime(10*a+1) then return a; end if; end do: end if; end proc:
CROSSREFS
KEYWORD
sign
AUTHOR
Juri-Stepan Gerasimov, Jun 09 2008
EXTENSIONS
More terms from R. J. Mathar, Apr 25 2010
STATUS
approved