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 A099541 #3 Jan 22 2024 21:57:33 %S A099541 1,5,9,16,18,27,35,43,48,56,60,69,73,73,73,74,81,85,86,90,93,97,99, %T A099541 106,109,114,115,118,123,126,126,131,139,146,147,148,154,158,165,167, %U A099541 176,180,188,189,191,200,201,206,209,210,211,216,223,224,229,230,233,239 %N A099541 Sum of the first n decimal places of log(Pi). %F A099541 a(n)=A099540(n+1)-1 %e A099541 The decimal places of log(Pi) are 14472988584940017..., leading to the sums %e A099541 1, 1+4, 1+4+4, 1+4+4+7, 1+4+4+7+2, ... which give the terms 1, 5, 9, 16, 18,... %t A099541 Accumulate[Rest[RealDigits[Log[Pi],10,100][[1]]]] (* _Harvey P. Dale_, Jan 22 2024 *) %Y A099541 Cf. A099540 for version that includes the initial "1." of log(Pi). A053510 for digits of log(Pi). %K A099541 base,easy,nonn %O A099541 1,2 %A A099541 Mark Hudson (mrmarkhudson(AT)hotmail.com), Oct 25 2004