OFFSET
1,1
LINKS
Muniru A Asiru, Table of n, a(n) for n = 1..20000
EXAMPLE
2 is a term because composite(2) = 6 (even);
3 is a term because composite(3) = 8 (even);
5 is a term because composite(5) = 10 (even);
7 is a term because composite(7) = 14 (even);
11 is a term because composite(11) = 20 (even).
PROG
(GAP) A:=Filtered([2..500], n->not IsPrime(n));;
a:=Filtered(Filtered([1..Length(A)], IsPrime), i->IsEvenInt(A[i])); # Muniru A Asiru, Feb 10 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Jan 20 2009
EXTENSIONS
Corrected (105 replaced by 107, 239 and 263 inserted) by R. J. Mathar, May 10 2010
STATUS
approved