%I A098534
%S A098534 0,1,1,2,3,2,2,4,3,4,7,5,6,5,5,4,6,4,4,8,6,8,8,7,6,10,7,8,15,11,14,10,
%T A098534 12,10,13,11,12,11,11,10,12,10,10,11,9,8,14,10,12,10,10,8,12,8,8,16,12,
%U A098534 16,13,14,12,17,14,16,18,16,16,17,15,14,17,13,12,22,16,20,18,17,14,22
%N A098534 Mod 3 analogue of Stern's diatomic series.
%C A098534 Essentially diagonal sums of Pascal's triangle modulo 3.
%F A098534 a(n)=sum{k=0..floor((n-1)/2), mod(binomial(n-k-1, k), 3)}
%Y A098534 Cf. A002487, A051638.
%Y A098534 Sequence in context: A023581 A023574 A131340 this_sequence A002307 A029247 
               A053269
%Y A098534 Adjacent sequences: A098531 A098532 A098533 this_sequence A098535 A098536 
               A098537
%K A098534 easy,nonn
%O A098534 0,4
%A A098534 Paul Barry (pbarry(AT)wit.ie), Sep 13 2004