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 A089300 #8 Feb 28 2015 07:41:13 %S A089300 1,1,3,4,9,13,25,33,56,76,122,170,264,360,538,707,1002,1332,1853,2409, %T A089300 3294 %N A089300 Number of planar partitions of n (A000219) that are non-squashing along rows and down columns (cf. A018819). %H A089300 N. J. A. Sloane and J. A. Sellers, <a href="http://arXiv.org/abs/math.CO/0312418">On non-squashing partitions</a>, Discrete Math., 294 (2005), 259-274. %e A089300 E.g. a(4) = 9: %e A089300 4.31.3.22.2.211.21..2..11 %e A089300 .....1....2.....1...1..11 %e A089300 ....................1.... %Y A089300 Cf. A000219, A000123, A018819, A008763, A001970, A089292. %K A089300 nonn,more %O A089300 0,3 %A A089300 _N. J. A. Sloane_, Dec 25 2003 %E A089300 More terms from _Wouter Meeussen_, Dec 30 2003