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A367672 a(n) is the denominator of the probability that the free polyomino with binary code A246521(n+1) appears in the version of the Eden growth model described in A367671 when n square cells have been added.

%I A367672 #16 Dec 03 2023 11:34:40
%S A367672 1,1,3,3,14,21,84,21,12,1008,126,21,315,5040,126,126,2016,1008,126,
%T A367672 672,60,99792,4989600,1155,3780,9072,66,30240,3360,4536,554400,453600,
%U A367672 60,45360,60,277200,498960,66,5184,9072,45360,189,13860,554400,4620,50400,1260,3465,73920,712800,554400,3465,12960,12600,453600,360
%N A367672 a(n) is the denominator of the probability that the free polyomino with binary code A246521(n+1) appears in the version of the Eden growth model described in A367671 when n square cells have been added.
%C A367672 Can be read as an irregular triangle, whose n-th row contains A000105(n) terms, n >= 1.
%C A367672 Terms on the n-th row are (2*n-1)-smooth.
%H A367672 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>.
%F A367672 A367671(n)/a(n) = (A367675(n)/A367676(n))*A335573(n+1).
%e A367672 As an irregular triangle:
%e A367672      1;
%e A367672      1;
%e A367672      3,   3;
%e A367672     14,  21, 84,  21,   12;
%e A367672   1008, 126, 21, 315, 5040, 126, 126, 2016, 1008, 126, 672, 60;
%e A367672   ...
%Y A367672 Cf. A000105, A246521, A335573, A367671 (numerators), A367674, A367675, A367676, A367761.
%K A367672 nonn,frac,tabf
%O A367672 1,3
%A A367672 _Pontus von Brömssen_, Nov 26 2023