A043990 - OEIS

%I #9 Aug 27 2021 01:45:17

%S 51,59,132,140,213,221,294,302,375,383,456,467,539,545,618,626,699,

%T 707,780,788,861,869,942,950,1023,1031,1104,1112,1185,1196,1268,1274,

%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_