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 A050341 #6 Dec 19 2015 13:28:09 %S A050341 1,1,5,5,15,25,55,105,35,170,145,425,205,571,660,1611,1010,1789,2938, %T A050341 1345,5941,315,3437,4596,5727,12047,7317,21190,2130,16533,19496,17836, %U A050341 47949,36232,74020,11940,73831,9841,78981,55627,43590,183208,15982 %N A050341 Number of factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487). %K A050341 nonn %O A050341 1,3 %A A050341 _Christian G. Bower_, Oct 15 1999