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 A255057 #9 Feb 21 2015 23:04:31 %S A255057 0,1,2,3,5,6,7,9,11,13,14,15,16,18,21,23,25,27,29,30,31,32,34,37,39, %T A255057 42,45,47,48,50,53,55,57,59,61,62,63,64,66,69,71,74,76,78,81,84,87,90, %U A255057 93,95,96,98,101,103,106,109,111,112,114,117,119,121,123,125,126,127 %N A255057 The trunk of number-of-runs beanstalk, halved: a(n) = A255056(n)/2. %H A255057 Antti Karttunen, <a href="/A255057/b255057.txt">Table of n, a(n) for n = 0..16142</a> %F A255057 a(n) = A255056(n)/2. %F A255057 a(n) = A255067(A255122(n)). %o A255057 (Scheme, two versions) %o A255057 (define (A255057 n) (/ (A255056 n) 2)) %o A255057 (define (A255057 n) (A255067 (A255122 n))) %Y A255057 First differences: A255337. %Y A255057 Characteristic function: A255339. %Y A255057 Cf. A255056, A255058, A255067, A255122, A255125, A255126, A255328, A255329, A255330, A255338. %K A255057 nonn %O A255057 0,3 %A A255057 _Antti Karttunen_, Feb 14 2015