login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Number of normal standard domino tableaux whose shape is the integer partition with Heinz number n.
8

%I #10 May 24 2018 16:06:15

%S 1,0,1,1,0,0,1,0,2,1,0,1,1,0,0,1,0,0,1,0,3,1,0,0,3,0,3,2,1,0,0,0,0,1,

%T 0,3,1,0,4,2,0,0,1,0,0,1,0,1,6,0,0,3,1,0,4,0,5,0,0,0,1,1,8,1,0,0,0,0,

%U 0,2,1,0,0,0,6,4,0,0,1,0,6,1,0,6,5,0,6,3,1,2,10,0,0,1,0,0,0,0,0,8,1,0,0,0,0,0

%N Number of normal standard domino tableaux whose shape is the integer partition with Heinz number n.

%C A generalized Young tableau of shape y is an array obtained by replacing the dots in the Ferrers diagram of y with positive integers. A tableau is normal if its entries span an initial interval of positive integers. A standard domino tableau is a generalized Young tableau in which all rows and columns are weakly increasing and all regions are dominos. The Heinz number of an integer partition (y_1,...,y_k) is prime(y_1)*...*prime(y_k).

%e The a(75) = 6 tableaux:

%e 1 2 4 1 2 3 1 2 2 1 1 4 1 1 4 1 1 3

%e 1 2 4 1 2 3 1 3 3 2 3 4 2 2 4 2 2 3

%e 3 3 4 4 4 4 2 3 3 3 4 4

%Y Cf. A000085, A000712, A000898, A001222, A004003, A056239, A099390, A112798, A122111, A138178, A153452, A238690, A296150, A296188, A297388, A299926, A300060, A300061.

%K nonn

%O 1,9

%A _Gus Wiseman_, Feb 23 2018