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A297244 Up-variation of the base-15 digits of n; see Comments.

%I A297244 #7 Jan 19 2018 19:14:00
%S A297244 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,12,13,0,0,0,
%T A297244 1,2,3,4,5,6,7,8,9,10,11,12,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,0,0,0,0,0,
%U A297244 1,2,3,4,5,6,7,8,9,10,0,0,0,0,0,0,1,2,3
%N A297244 Up-variation of the base-15 digits of n; see Comments.
%C A297244 Suppose that a number n has base-b digits b(m), b(m-1), ..., b(0).  The base-b down-variation of n is the sum DV(n,b) of all d(i)-d(i-1) for which d(i) > d(i-1); the base-b up-variation of n is the sum UV(n,b) of all d(k-1)-d(k) for which d(k) < d(k-1).  The total base-b variation of n is the sum TV(n,b) = DV(n,b) + UV(n,b). Every positive integer occurs infinitely many times. See A297330 for a guide to related sequences and partitions of the natural numbers.
%H A297244 Clark Kimberling, <a href="/A297244/b297244.txt">Table of n, a(n) for n = 1..10000</a>
%e A297244 19 in base 15: 1,4; here UV = 3, so that a(19) = 3.
%t A297244 g[n_, b_] := Differences[IntegerDigits[n, b]];
%t A297244 b = 15; z = 120; Table[-Total[Select[g[n, b], # < 0 &]], {n, 1, z}];  (* A297243 *)
%t A297244 Table[Total[Select[g[n, b], # > 0 &]], {n, 1, z}]; (* A297244 *)
%Y A297244 Cf. A297243, A297245, A297330.
%K A297244 nonn,base,easy
%O A297244 1,18
%A A297244 _Clark Kimberling_, Jan 17 2018