login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A195251 Number of lower triangles of a 5X5 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less 1

%I #5 Mar 31 2012 12:36:24

%S 32768,14348907,67379894,147824001,237368212,329060365,421064386,

%T 513095495,605126604,697157713,789188822,881219931,973251040,

%U 1065282149,1157313258,1249344367,1341375476,1433406585,1525437694,1617468803

%N Number of lower triangles of a 5X5 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less

%C Row 5 of A195248

%H R. H. Hardin, <a href="/A195251/b195251.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n) = 92031109*n - 223153377 for n>6

%e Some solutions for n=5

%e ..3..........5..........5..........4..........2..........0..........3

%e ..3.5........5.3........3.3........2.2........3.3........1.2........2.1

%e ..3.4.3......3.3.2......3.4.4......2.2.3......3.2.3......3.3.1......3.3.2

%e ..5.4.3.4....5.3.2.0....4.2.3.4....4.2.1.2....2.4.2.4....4.3.2.2....3.1.3.1

%e ..5.5.3.5.4..3.4.2.2.2..2.2.3.3.4..2.2.2.1.1..3.2.2.4.3..3.2.1.3.3..1.1.3.2.2

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 13 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:34 EDT 2024. Contains 371265 sequences. (Running on oeis4.)