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.
%I A111395 #16 Jul 15 2023 14:03:05 %S A111395 1,5,2,1,6,3,1,7,3,1,9,4,2,1,6,3,1,7,3,1,9,4,2,1,5,2,1,7,3,1,9,4,2,1, %T A111395 5,2,1,7,3,1,9,4,2,1,5,2,1,7,3,1,8,4,2,1,5,2,1,6,3,1,8,4,2,1,5,2,1,6, %U A111395 3,1,8,4,2,1,5,2,1,6,3,1,8,4,2,1,5,2,1,6 %N A111395 First digit of powers of 5. %H A111395 Seiichi Manyama, <a href="/A111395/b111395.txt">Table of n, a(n) for n = 0..10000</a> %F A111395 a(n) = A000030(A000351(n)). - _Seiichi Manyama_, Jul 15 2023 %t A111395 First[IntegerDigits[#]]&/@(5^Range[0,100]) (* _Harvey P. Dale_, Jan 13 2015 *) %o A111395 (PARI) a(n) = digits(5^n)[1]; \\ _Michel Marcus_, Jan 07 2014 %Y A111395 Cf. A008952, A060956. %Y A111395 Cf. A000030, A000351, A008566. %K A111395 easy,nonn,base %O A111395 0,2 %A A111395 Almerio A. Castro (almerio.castro(AT)gmail.com), Nov 11 2005 %E A111395 a(0)=1 prepended, and more terms from _Michel Marcus_, Jan 07 2014