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Number of squares in all tilings of a 9 X n rectangle using integer-sided square tiles.
3

%I #8 Sep 05 2021 22:01:23

%S 0,9,600,9533,189172,3293575,56128696,929801662,15124830042,

%T 242394178200,3840094402532,60260456120659,938232581234924,

%U 14511287055938491,223171309100257664,3415393756038359269,52045507693324954598,790109733965301854764,11954668671384269574304

%N Number of squares in all tilings of a 9 X n rectangle using integer-sided square tiles.

%H Alois P. Heinz, <a href="/A226552/b226552.txt">Table of n, a(n) for n = 0..500</a>

%Y Column k=9 of A226545.

%Y Cf. A219928.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Jun 10 2013