Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #23 Jan 14 2021 21:17:43
%S 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,
%T 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,
%U 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,103,104,105,106,107,108,109,124,125,126,127,128
%N Numbers such that the absolute values of the differences between any pair of digits are distinct.
%C More than the usual number of terms are shown in order to distinguish this from neighboring sequences.
%C The definition as it stands would also include single-digit numbers. The nontrivial terms are those with more than 2 digits. - _M. F. Hasler_, Oct 08 2019
%D Eric Angelini, Posting to Sequence Fans Mailing List, Oct 07 2019.
%H Eric Angelini and Jean-Marc Falcoz, <a href="/A328075/b328075.txt">Table of n, a(n) for n = 1..1862</a> (The complete list of terms)
%e The 2-digit absolute differences of 1862 are 7,5,1,2,6,4, all different, so 1862 is a term (and also the number of terms).
%o (PARI) select( is(n)={n<99||#Set(abs(concat(vector(-1+#n=digits(n),k,n[1..k]-vector(k,i,1)*n[k+1]))))*2==#n*(#n-1)}, [1..9999]) \\ _M. F. Hasler_, Oct 08 2019
%K nonn,base,fini
%O 1,1
%A _N. J. A. Sloane_, Oct 07 2019