cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A067449 Smallest n-th power starting with 8.

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%I A067449 #10 Apr 04 2025 22:31:48
%S A067449 8,81,8,81,844596301,85766121,823543,815730721,8662995818654939,
%T A067449 819628286980801,8589934592,8916100448256,8192,
%U A067449 805345924720991301978201,8629188747598184440949
%N A067449 Smallest n-th power starting with 8.
%C A067449 Terms from _Robert G. Wilson v_.
%H A067449 Robert Israel, <a href="/A067449/b067449.txt">Table of n, a(n) for n = 1..492</a>
%p A067449 f:= proc(n) local x, y;
%p A067449   for x from 2 do
%p A067449     y:= x^n;
%p A067449     if floor(y/10^ilog10(y)) = 8 then return x^n fi
%p A067449   od
%p A067449 end proc:
%p A067449 map(f, [$1..50]); # _Robert Israel_, Apr 02 2025
%t A067449 a = {}; Do[k = 1; While[First[IntegerDigits[k^n]] != 8, k++ ]; a = Append[a, k^n], {n, 1, 25}]; a (* _Robert G. Wilson v_ *)
%Y A067449 Cf. A067442, A067443, A067444, A067445, A067446, A067447, A067448.
%K A067449 base,easy,nonn
%O A067449 1,1
%A A067449 _Amarnath Murthy_, Feb 05 2002