%I #8 Feb 28 2015 07:41:13
%S 1,1,3,4,9,13,25,33,56,76,122,170,264,360,538,707,1002,1332,1853,2409,
%T 3294
%N Number of planar partitions of n (A000219) that are non-squashing along rows and down columns (cf. A018819).
%H 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 E.g. a(4) = 9:
%e 4.31.3.22.2.211.21..2..11
%e .....1....2.....1...1..11
%e ....................1....
%Y Cf. A000219, A000123, A018819, A008763, A001970, A089292.
%K nonn,more
%O 0,3
%A _N. J. A. Sloane_, Dec 25 2003
%E More terms from _Wouter Meeussen_, Dec 30 2003