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 A056863 #15 Aug 19 2017 16:24:52 %S A056863 1,-1,1,-2,1,1,-3,4,2,1,-4,9,10,4,1,-5,16,28,24,8,1,-6,25,60,80,56,16 %N A056863 Related to triangle A056858 of number of rises in set partitions of n at a given index i. %D A056863 W. C. Yang, Conjectures on some sequences involving set partitions and Bell numbers, preprint, 2000. [Apparently unpublished. - _R. J. Mathar_, Oct 06 2011] %e A056863 1,-1; %e A056863 1,-2,1; %e A056863 1,-3,4,2; %e A056863 1,-4,9,10,4; %e A056863 ... %Y A056863 Cf. Bell numbers A000110. %Y A056863 Cf. A056857-A056862. %K A056863 sign,tabf,more,obsc,uned %O A056863 1,4 %A A056863 Winston C. Yang (winston(AT)cs.wisc.edu), Aug 31 2000