A159984 - OEIS

%I #5 Nov 18 2014 13:48:41

%S 1,1,2,0,4,2,2,4,0,2,1,1,2,0,0,0,0,0,0,0,0,0,0,0,4,2,2,4,0,3,4,4,3,0,

%T 4,2,2,4,0,0,0,0,0,0,0,0,0,0,0,2,1,1,2,0,4,2,2,4,0,2,1,1,2,0,0,0,0,0,

%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

%N Catalan numbers read modulo 5 .

%F a(n)= A000108(n) mod 5 .

%t Mod[CatalanNumber[Range[0,110]],5] (* _Harvey P. Dale_, Nov 18 2014 *)

%K easy,nonn

%O 0,3

%A _Philippe Deléham_, Apr 28 2009

%E Corrected and extended by _Philippe Deléham_, Sep 09 2009