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A333037 Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7.

%I A333037 #8 Mar 07 2020 00:06:43
%S A333037 4,0,0,0,0,84,20,0,0,0,380,180,0,8,0,1076,764,40,20,0,2380,2316,64,48,
%T A333037 0,4716,5188,224,52,0,8236,10492,360,92,0,13620,18772,632,108,0,21188,
%U A333037 31380,864,196,0,31596,49228,1376,224,8,44980,74268,1920,272,8
%N A333037 Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7.
%C A333037 See the links in A331456 for images of the crosses.
%e A333037 Table begins:
%e A333037 4, 0, 0, 0, 0
%e A333037 84, 20, 0, 0, 0
%e A333037 380, 180, 0, 8, 0
%e A333037 1076, 764, 40, 20, 0
%e A333037 2380, 2316, 64, 48, 0
%e A333037 4716, 5188, 224, 52, 0
%e A333037 8236, 10492, 360, 92, 0
%e A333037 13620, 18772, 632, 108, 0
%e A333037 21188, 31380, 864, 196, 0
%e A333037 31596, 49228, 1376, 224, 8
%e A333037 44980, 74268, 1920, 272, 8
%e A333037 The row sums are A331456.
%Y A333037 Cf. A331456 (regions), A333035 (vertices), A333036 (edges), A331451, A332723, A333025.
%K A333037 nonn,more,tabf
%O A333037 0,1
%A A333037 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 06 2020