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A096105 Numbers such that every digit is a multiple of the digit to its left. 2

%I #8 Sep 01 2019 18:17:42

%S 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,24,26,28,30,33,

%T 36,39,40,44,48,50,55,60,66,70,77,80,88,90,99,100,110,111,112,113,114,

%U 115,116,117,118,119,120,122,124,126,128,130,133,136,139,140,144,148

%N Numbers such that every digit is a multiple of the digit to its left.

%C The number of n-digit terms is (n^4+22n^3+95n^2+98n)/24. - David Wasserman

%H Robert Israel, <a href="/A096105/b096105.txt">Table of n, a(n) for n = 1..10000</a>

%p for i from 1 to 9 do g(i):= [seq(t,t=0..9,i)] od: g(0):= [0]:

%p A[1]:= [$1..9]:

%p for d from 2 to 4 do A[d]:= map(t -> op(10*t+~g(t mod 10)),A[d-1]) od:

%p map(op,[seq(A[d],d=1..4)]); # _Robert Israel_, Sep 01 2019

%Y Cf. A096106.

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_, Jun 26 2004

%E Edited by _David Wasserman_, Dec 28 2005

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Last modified May 11 01:12 EDT 2024. Contains 372388 sequences. (Running on oeis4.)