A280958 - OEIS

A280958

Number of n X 5 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%I #6 Apr 17 2022 22:06:43

%S 30,997,9899,126267,1599234,20029500,251270618,3152475854,39530438497,

%T 495721552160,6216700479112,77962372076794,977711970478121,

%U 12261314459515967,153766955348557489,1928363669762835672

%N Number of n X 5 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%C Column 5 of A280961.

%H R. H. Hardin, <a href="/A280958/b280958.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A280961.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 11 2017