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A334700 Triangle read by rows: T(n,k) (n >= 1, 3 <= k <= n+2) = one-quarter of the number of k-sided cells in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).

%I A334700 #9 May 30 2020 19:34:01
%S A334700 1,12,2,51,28,6,170,96,14,0,415,268,112,19,2,854,598,100,14,0,0,1587,
%T A334700 1309,460,126,10,0,0
%N A334700 Triangle read by rows: T(n,k) (n >= 1, 3 <= k <= n+2) = one-quarter of the number of k-sided cells in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).
%C A334700 This is the triangle in A334699 with all entries divided by 4.
%C A334700 No formula is known.
%C A334700 For illustrations see A331452.
%H A334700 Scott R. Shannon, <a href="/A334691/a334691.txt">Data for triangles A334691 and A334699</a>
%H A334700 Scott R. Shannon, <a href="/A331452/a331452_12.png">Colored illustration for n = 2</a>
%e A334700 Triangle begins:
%e A334700 1,
%e A334700 12, 2,
%e A334700 51, 28, 6,
%e A334700 170, 96, 14, 0,
%e A334700 415, 268, 112, 19, 2,
%e A334700 854, 598, 100, 14, 0, 0,
%e A334700 1587, 1309, 460, 126, 10, 0, 0
%e A334700 ...
%Y A334700 Cf. A255011, A331452, A331449, A334690, A334691, A334695, A334696, A334699.
%K A334700 nonn,tabf,more
%O A334700 1,2
%A A334700 _Scott R. Shannon_ and _N. J. A. Sloane_, May 18 2020