OFFSET
1,1
EXAMPLE
a(4) = 303 because 303^4 = 8428892481 has 4 digits '8' and is the least number to have this property.
MAPLE
P:=proc(q, h) local a, j, k, n, t; for n from 1 to q do for k from 1 to q do
a:=convert(k^n, base, 10); t:=0; for j from 1 to nops(a) do if a[j]=h then t:=t+1; fi; od;
if t=n then print(k); break; fi; od; od; end: P(10^9, 8);
MATHEMATICA
lnx[n_]:=Module[{x=1}, While[DigitCount[x^n, 10, 8]!=n, x++]; x]; Array[lnx, 50] (* Harvey P. Dale, Jul 05 2023 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Paolo P. Lava, Apr 19 2017
STATUS
approved