A070268 - OEIS

%I #12 Feb 18 2019 02:15:11

%S 29,41,101,137,229,281,429,433,617,641,645,741,821,969,1021,1085,1129,

%T 1221,1309,1433,1489,1581,1597,1605,1613,1697,1741,1877,1885,2013,

%U 2053,2081,2085,2109,2161,2237,2265,2309,2337,2377,2381,2397,2409,2633,2657

%N Numbers n such that mu(n) + mu(n+1) + mu(n+2) = -3.

%C All terms == 1 (mod 4). - _Robert Israel_, Feb 17 2019

%H Robert Israel, <a href="/A070268/b070268.txt">Table of n, a(n) for n = 1..10000</a>

%p with(numtheory): A070268:=n->`if`(mobius(n)+mobius(n+1)+mobius(n+2)=-3, n, NULL): seq(A070268(n), n=1..10^4); # _Wesley Ivan Hurt_, Feb 05 2017

%o (PARI) for(n=1,1000,if(moebius(n)+moebius(n+1)+moebius(n+2)==-3,print1(n,",")))

%Y Cf. A063838.

%K nonn

%O 1,1

%A Sharon Sela (sharonsela(AT)hotmail.com), May 09 2002

%E More terms from _Benoit Cloitre_, May 13 2002