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A089300 Number of planar partitions of n (A000219) that are non-squashing along rows and down columns (cf. A018819). 2
1, 1, 3, 4, 9, 13, 25, 33, 56, 76, 122, 170, 264, 360, 538, 707, 1002, 1332, 1853, 2409, 3294 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..20.

N. J. A. Sloane and J. A. Sellers, On non-squashing partitions, Discrete Math., 294 (2005), 259-274.

EXAMPLE

E.g. a(4) = 9:

4.31.3.22.2.211.21..2..11

.....1....2.....1...1..11

....................1....

CROSSREFS

Cf. A000219, A000123, A018819, A008763, A001970, A089292.

Sequence in context: A326981 A124285 A131326 * A250111 A079284 A000624

Adjacent sequences:  A089297 A089298 A089299 * A089301 A089302 A089303

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Dec 25 2003

EXTENSIONS

More terms from Wouter Meeussen, Dec 30 2003

STATUS

approved

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Last modified October 18 10:27 EDT 2019. Contains 328147 sequences. (Running on oeis4.)