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.

A070327 Smallest nontrivial power of n starting with n and greater than n.

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%I A070327 #17 Feb 23 2025 09:25:18
%S A070327 256,387420489,4096,59604644775390625,60466176,79792266297612001,
%T A070327 8589934592,984770902183611232881,100,1191817653772720942460132761,
%U A070327 1283918464548864,137858491849,1475789056
%N A070327 Smallest nontrivial power of n starting with n and greater than n.
%C A070327 a(n) = n ^ A051248(n). - _Reinhard Zumkeller_, Sep 29 2011
%H A070327 Reinhard Zumkeller, <a href="/A070327/b070327.txt">Table of n, a(n) for n = 2..32</a>
%F A070327 f[n_] := Block[{k = 2, s = ToString[n]}, While[ StringPosition[ ToString[n^k], s, 1] != {{1, Integer_}}, k++ ]; n^k]; Table[ f[n], {n, 2, 10}]
%o A070327 (Python)
%o A070327 from itertools import count
%o A070327 def a(n):
%o A070327     s = str(n)
%o A070327     return next(n**e for e in count(2) if str(n**e).startswith(s))
%o A070327 print([a(n) for n in range(2, 16)]) # _Michael S. Branicky_, Feb 23 2025
%Y A070327 Cf. A045537, A104782.
%K A070327 base,nonn
%O A070327 2,1
%A A070327 _Amarnath Murthy_, May 11 2002
%E A070327 Edited by _Robert G. Wilson v_, May 14 2002
%E A070327 The 15th term is too large to include.