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 A099538 #3 May 30 2012 15:45:28 %S A099538 1,5,6,10,12,13,16,21,27,29,32,39,42,42,51,56,56,60,68,76,76,77,83,91, %T A099538 99,106,108,112,114,114,123,129,138,146,146,153,161,166,172,181,187, %U A099538 194,195,203,210,215,218,225,231,240,244,252,252,259,262,263,270,276,282 %N A099538 Sum of the first n digits of sqrt(2), including the initial "1". %H A099538 Harvey P. Dale, <a href="/A099538/b099538.txt">Table of n, a(n) for n = 1..1000</a> %e A099538 sqrt(2)=1.41421356237... so the sums are 1, 1+4, 1+4+1, 1+4+1+4, 1+4+1+4+2,... %e A099538 which gives 1, 5, 6, 10, 12,... %t A099538 Accumulate[RealDigits[Sqrt[2],10,60][[1]]] (* _Harvey P. Dale_, May 30 2012 *) %Y A099538 Cf. A002193 for digits of sqrt(2). Other sequences like this one for other constants: A099534-A099537, A039918, A046974, A046975. %K A099538 base,easy,nonn %O A099538 1,2 %A A099538 Mark Hudson (mrmarkhudson(AT)hotmail.com), Oct 22 2004