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%I #13 Dec 02 2020 05:35:27
%S 1,1,4,1,1,9,1,1,4,16,1,1,1,5,25,1,1,1,4,9,36,1,1,1,1,4,10,49,1,1,1,1,
%T 4,5,16,64,1,1,1,1,1,4,9,18,81,1,1,1,1,1,4,5,10,25,100,1,1,1,1,1,1,4,
%U 5,11,27,121,1,1,1,1,1,1,4,4,9,16,36,144,1,1,1,1,1,1,1,4,5,9,17,39,169
%N Triangle read by rows: T(n,k) (n>=k>=1) = f(n,n-k+1) where f(n,k) = floor((n/k)*floor(n/k)).
%H Robert J. McEliece and Herbert Taylor, <a href="https://doi.org/10.1016/0097-3165(73)90069-1">Covering tori with squares</a>, Journal of Combinatorial Theory, Series A 14.1 (1973): 119-124.
%e Triangle begins:
%e 1,
%e 1, 4,
%e 1, 1, 9,
%e 1, 1, 4, 16,
%e 1, 1, 1, 5, 25,
%e 1, 1, 1, 4, 9, 36,
%e 1, 1, 1, 1, 4, 10, 49,
%e 1, 1, 1, 1, 4, 5, 16, 64,
%e 1, 1, 1, 1, 1, 4, 9, 18, 81,
%e 1, 1, 1, 1, 1, 4, 5, 10, 25, 100,
%e 1, 1, 1, 1, 1, 1, 4, 5, 11, 27, 121,
%e 1, 1, 1, 1, 1, 1, 4, 4, 9, 16, 36, 144,
%e 1, 1, 1, 1, 1, 1, 1, 4, 5, 9, 17, 39, 169,
%e ...
%Y Cf. A331145-A331154.
%K nonn,tabl
%O 1,3
%A _N. J. A. Sloane_, Jan 14 2020
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