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 A073361 #4 Mar 30 2012 18:36:32 %S A073361 1,5,15,31,65,105,151,275,420,631,695,1050,1411,1685,2385,2941,3425, %T A073361 4410,5326,6995,7350,9316,10880 %N A073361 Nested floor product of n and fractions (k+1)/k for all k>0 (mod 4), divided by 4. %F A073361 a(n)=(1/3)[...[[[[n(2/1)](3/2)](4/3)](6/5)]...(k+1)/k]..., k>0 (mod 4), where [x] = floor of x; this infinite nested floor product will eventually level-off at a(n). %e A073361 a(1)=1 since (1/4)[[[[1(2/1)](3/2)](4/3)](6/5)]=(1/4)[4(6/5)]=1 %Y A073361 Cf. A073359, A073360. %K A073361 easy,nonn %O A073361 1,2 %A A073361 _Paul D. Hanna_, Jul 29 2002