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A061425 Sum of digits = 8 times number of digits. 19

%I #9 Dec 07 2020 01:28:43

%S 8,79,88,97,699,789,798,879,888,897,969,978,987,996,5999,6899,6989,

%T 6998,7799,7889,7898,7979,7988,7997,8699,8789,8798,8879,8888,8897,

%U 8969,8978,8987,8996,9599,9689,9698,9779,9788,9797,9869,9878,9887,9896,9959

%N Sum of digits = 8 times number of digits.

%H Robert Israel, <a href="/A061425/b061425.txt">Table of n, a(n) for n = 1..10000</a>

%e 879 is a term as the arithmetic mean of the digits is (8+7+9)/3 = 8.

%p Q:= proc(n,t) option remember; local j,R;

%p if t > 9*n or t <= 0 then return [] fi;

%p R:= NULL;

%p for j from 0 to min(t,9) do

%p R:= R, op(map(s -> 10*s+j, procname(n-1,t-j)))

%p od;

%p [R]

%p end proc;

%p for i from 0 to 9 do Q(1,i):= [i] od:

%p seq(op(sort(Q(d,8*d))),d=1..4); # _Robert Israel_, Dec 07 2020

%Y Cf. A061383-A061388, A061423-A061424.

%K nonn,base,easy

%O 1,1

%A _Amarnath Murthy_, May 03 2001

%E More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001

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Last modified December 9 12:57 EST 2023. Contains 367690 sequences. (Running on oeis4.)