cp's OEIS Frontend

A189276 Number of nX5 array permutations with each element not moved or moved diagonally or antidiagonally by one.

%I A189276 #7 Jul 22 2025 11:39:57
%S A189276 1,64,1125,29241,670480,15594601,361199937,8366395024,193788877917,
%T A189276 4488512569321,103963620831296,2408013388109169,55774648500091873,
%U A189276 1291857814182989824,29922137343175603701,693059476202859612025
%N A189276 Number of nX5 array permutations with each element not moved or moved diagonally or antidiagonally by one.
%C A189276 Column 5 of A189280
%H A189276 R. H. Hardin, <a href="/A189276/b189276.txt">Table of n, a(n) for n = 1..200</a>
%F A189276 Empirical: a(n) = 25*a(n-1) -1067*a(n-3) +1111*a(n-4) +19248*a(n-5) -37086*a(n-6) +40374*a(n-7) -18000*a(n-8) -44874*a(n-9) +111258*a(n-10) -91872*a(n-11) +9999*a(n-12) -13743*a(n-13) -891*a(n-15) -81*a(n-16)
%e A189276 Some solutions for 3X5
%e A189276 ..0..1..8..7..4....0..5..2..7..8....0..1..8..3..4....0..5..8..7..4
%e A189276 .11..2..3.12.13....1..6..3..4.13....5.12.13..2..9....1..2..3.12..9
%e A189276 .10..5..6..9.14...10.11.12..9.14...10.11..6..7.14...10.11..6.13.14
%K A189276 nonn
%O A189276 1,2
%A A189276 _R. H. Hardin_ Apr 19 2011