OFFSET
1,2
COMMENTS
Is this the same as A173390? - R. J. Mathar, Jul 22 2010
FORMULA
prime(a(n+1)-1) = n-th balanced prime.
MAPLE
A008578 := proc(n) if n = 1 then 1; else ithprime(n-1) ; end if; end proc: for n from 1 to 1000 do sp := A008578(n)+A008578(n+2) ; if type(sp, 'even') and numtheory[bigomega](sp) = 2 then printf("%d, ", n) ; end if; end do: # R. J. Mathar, Apr 25 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Mar 01 2010
EXTENSIONS
All but one value shifted by 1, and missing values (40, 634, 762) inserted, by R. J. Mathar, Apr 25 2010
STATUS
approved