%I #2 Mar 31 2012 13:21:18
%S 0,1,2,11,10,9,18,19,20,101,100,99,90,91,92,83,82,81,162,163,164,173,
%T 172,171,180,181,182,911,910,909,900,901,902,893,892,891,810,811,812,
%U 821,820,819,828,829,830,749,748,747,738,739,740,731,730,729,1458
%N Central diagonal of A163334 and A163336 divided by 4.
%Y a(n) = A163343(n)/4.
%K nonn
%O 0,3
%A _Antti Karttunen_, Jul 29 2009