OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Squarefree
MATHEMATICA
mx = 70; m = Select[Range[2 mx], SquareFreeQ]; m1 = Select[m, MoebiusMu[#] == 1 &]; m2 = Complement[m, m1]; a = Flatten[Transpose[{Take[m1, mx/2], Take[m2, mx/2]}]] (* Ivan Neretin, May 18 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jan 01 2005
STATUS
approved