cp's OEIS Frontend

A271039 Number of 7X7X7 triangular 0..n arrays with some element less than a w, nw or ne neighbor exactly once.

%I A271039 #4 Mar 29 2016 07:50:31
%S A271039 642,56754,2173554,50108414,804566180,9790184488,95420380090,
%T A271039 774600507974,5391017644856,32890239598008,179007489630476,
%U A271039 881467345491584,3972721376352724,16545720243662726,64195774252619306
%N A271039 Number of 7X7X7 triangular 0..n arrays with some element less than a w, nw or ne neighbor exactly once.
%C A271039 Row 7 of A271034.
%H A271039 R. H. Hardin, <a href="/A271039/b271039.txt">Table of n, a(n) for n = 1..18</a>
%e A271039 Some solutions for n=2
%e A271039 ........0..............0..............0..............0..............0
%e A271039 .......0.0............0.0............0.0............0.1............0.0
%e A271039 ......0.0.0..........0.2.2..........0.1.1..........0.1.1..........0.0.0
%e A271039 .....0.0.1.0........1.1.2.2........0.1.1.1........0.0.2.2........0.0.1.1
%e A271039 ....0.1.1.1.2......1.1.2.2.2......1.1.2.1.2......0.0.2.2.2......1.1.1.1.1
%e A271039 ...0.1.1.1.2.2....1.1.2.2.2.2....2.2.2.2.2.2....0.1.2.2.2.2....0.1.1.1.1.1
%e A271039 ..0.2.2.2.2.2.2..1.1.2.2.2.2.2..2.2.2.2.2.2.2..0.1.2.2.2.2.2..1.2.2.2.2.2.2
%Y A271039 Cf. A271034.
%K A271039 nonn
%O A271039 1,1
%A A271039 _R. H. Hardin_, Mar 29 2016