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%I #11 Aug 28 2021 02:50:34
%S 16,61,116,169,216,261,316,361,416,461,516,561,619,661,716,761,816,
%T 861,916,961,1016,1061,1116,1169,1216,1261,1316,1361,1416,1461,1516,
%U 1561,1699,1716,1761,1816,1861,1916,1961,2016,2061
%N Numbers k such that 1 and 6 occur juxtaposed in the base-10 representation of k but not of k+1.
%H Michael De Vlieger, <a href="/A044009/b044009.txt">Table of n, a(n) for n = 1..10000</a>
%t With[{j = 1, k = 6}, SequencePosition[Table[If[SequenceCount[IntegerDigits[n], {j, k}] > 0 || SequenceCount[IntegerDigits[n], {k, j}] > 0, 1, 0], {n, 2100}], {1, 0}][[All, 1]]] (* _Michael De Vlieger_, Aug 27 2021 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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