OFFSET
1,1
FORMULA
For each p, the semiprime is p + 4.
a(n) = A137626(n) + 4. - Sean A. Irvine, Feb 13 2012
EXAMPLE
a(2)=35 because when p=29 (resp. 31), p+4=33 (resp. 35) and are semiprime (3*3 resp. 5*7).
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Enoch Haga, Jan 30 2008
EXTENSIONS
a(11) from Sean A. Irvine, Feb 12 2012
a(1) corrected for consistency with change in A137626 by Sean A. Irvine, Jun 21 2018
a(12)-a(15) from Giovanni Resta, Jun 22 2018
STATUS
approved