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A265983 Number of 3Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself. 1

%I

%S 1,123,1267,11573,320641,8061815,133236904,2362292183,49521535540,

%T 1008039449030,19153337324312,370373113285491,7361128495277353,

%U 145077471406639845,2828271548979912832,55370542134158497160

%N Number of 3Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors less than itself.

%C Row 3 of A265981.

%H R. H. Hardin, <a href="/A265983/b265983.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..2..4..0....2..0..0..2....0..3..4..0....0..0..0..0....0..4..1..1

%e ..2..0..0..1....3..0..0..3....1..0..0..0....2..0..0..0....2..0..0..3

%e ..2..0..4..0....1..1..1..2....1..4..0..0....1..4..0..2....2..1..1..1

%Y Cf. A265981.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 19 2015

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Last modified September 23 11:51 EDT 2021. Contains 347612 sequences. (Running on oeis4.)