This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A296751 #7 Jan 27 2023 19:25:49 %S A296751 15,16,17,18,19,20,21,22,23,24,25,29,30,31,32,33,34,35,36,37,38,43,44, %T A296751 45,46,47,48,49,50,51,57,58,59,60,61,62,63,64,71,72,73,74,75,76,77,85, %U A296751 86,87,88,89,90,99,100,101,102,103,113,114,115,116,127,128 %N A296751 Numbers whose base-13 digits d(m), d(m-1), ..., d(0) have #(rises) > #(falls); see Comments. %C A296751 A rise is an index i such that d(i) < d(i+1); a fall is an index i such that d(i) > d(i+1). The sequences A296751-A296753 partition the natural numbers. See the guide at A296712. %H A296751 Clark Kimberling, <a href="/A296751/b296751.txt">Table of n, a(n) for n = 1..10000</a> %e A296751 The base-13 digits of 1000 are 5,11,12; here #(rises) = 2 and #(falls) = 0, so 1000 is in the sequence. %t A296751 z = 200; b = 13; d[n_] := Sign[Differences[IntegerDigits[n, b]]]; %t A296751 Select[Range [z], Count[d[#], -1] == Count[d[#], 1] &] (* A296750 *) %t A296751 Select[Range [z], Count[d[#], -1] < Count[d[#], 1] &] (* A296751 *) %t A296751 Select[Range [z], Count[d[#], -1] > Count[d[#], 1] &] (* A296752 *) %Y A296751 Cf. A296750, A296752, A296712. %K A296751 nonn,base,easy %O A296751 1,1 %A A296751 _Clark Kimberling_, Jan 08 2018