OFFSET
2,1
COMMENTS
Row n contains numbers m <= n such that gcd(m,n) > 1, i.e., numbers m in the cototient of n. - Michael De Vlieger, Mar 13 2018
LINKS
Michael De Vlieger, Table of n, a(n) for n = 2..12949 (rows 2 <= n <= 256).
EXAMPLE
2;
3;
2,4;
5;
2,3,4,6;
7;
...
MATHEMATICA
Table[Select[Range@ n, ! CoprimeQ[#, n] &], {n, 20}] // Flatten (* Michael De Vlieger, Mar 13 2018 *)
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Franklin T. Adams-Watters, Sep 11 2006
STATUS
approved