OFFSET
0,2
COMMENTS
Entries in table are sometimes called semiprimes or biprimes (see A001358).
EXAMPLE
Table begins
1 3 5 7 11 13 ...
3 9 15 21 33 ...
5 15 25 35 ...
MAPLE
a[1] := 1:for j from 2 to 100 do a[j] := ithprime(j):od:s := 0:for j from 1 to 16 do for i from 1 to j do s := s+1:b[s] := a[j-i+1]*a[i]; od:od:seq(b[q], q=1..s);
CROSSREFS
KEYWORD
AUTHOR
Stuart M. Ellerstein (ellerstein(AT)aol.com), Aug 16 2002
EXTENSIONS
Corrected and extended by Sascha Kurz, Jan 28 2003
STATUS
approved