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 A170874 #7 Feb 22 2015 23:27:15 %S A170874 9,3,12,4,6,7,14,3,7,13,11,0,12,7,10,4,13,1,11,14,3,15,8,1,0,1,5,2,12, %T A170874 11,5,6,10,1,12,14,12,12,3,10,15,6,5,12,12,0,1,9,0,12,0,3,13,15,3,4,7, %U A170874 0,9,10,15,15,11,13,8,14,4,11,5,9,15,10,0,3,10,9,15,0,14,14,13,0,6,4,9,12 %N A170874 Hexadecimal expansion of Euler-Mascheroni constant gamma. %F A170874 a(n) = 8*A104015(4n)+4*A104015(4n+1)+2*A104015(4n+2)+1*A104015(4n+3). %e A170874 .93C467E37DB0C7A4D1BE3F810152CB56A1CECC3AF65CC0190C03DF34709AFFBD8E4B5... %t A170874 RealDigits[EulerGamma~N~200, 16][[1]] %Y A170874 Cf. A104015, A001620. %K A170874 cons,base,easy,nonn %O A170874 0,1 %A A170874 _Andrew J. Robbins_, Jan 03 2010, at the request of _N. J. A. Sloane_