%I #9 Aug 23 2021 06:36:46
%S 51,59,132,140,213,221,294,302,375,383,456,459,531,545,618,626,699,
%T 707,780,788,861,869,942,950,1023,1031,1104,1112,1185,1188,1260,1274,
%U 1347,1355,1428,1436,1509,1517,1590,1598,1671,1679
%N Numbers k such that 5 and 6 occur juxtaposed in the base-9 representation of k but not of k-1.
%Y Cf. A007095.
%K nonn,base
%O 1,1
%A _Clark Kimberling_