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!)
A255156 Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1 1

%I #4 Feb 15 2015 10:44:45

%S 773,3553,19437,102481,538898,2861823,15122739,79837911,422334503,

%T 2232885898,11796944893,62343454109,329540721878,1741777153766,

%U 9205398349762,48651701099440,257137977856611,1359050738800780

%N Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1

%C Column 5 of A255159

%H R. H. Hardin, <a href="/A255156/b255156.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +3*a(n-2) +43*a(n-3) +222*a(n-4) +483*a(n-5) +699*a(n-6) -1042*a(n-7) -6280*a(n-8) -8249*a(n-9) -1345*a(n-10) +27130*a(n-11) +70234*a(n-12) +34439*a(n-13) -120173*a(n-14) -327848*a(n-15) -224691*a(n-16) +570287*a(n-17) +725657*a(n-18) -400955*a(n-19) -379269*a(n-20) -313214*a(n-21) -1648508*a(n-22) -628660*a(n-23) +908056*a(n-24) +147963*a(n-25) +688746*a(n-26) +1016586*a(n-27) -601897*a(n-28) +764158*a(n-29) +346062*a(n-30) +109489*a(n-31) +838856*a(n-32) +52254*a(n-33) -122065*a(n-34) +474470*a(n-35) -562476*a(n-36) +585830*a(n-37) -420411*a(n-38) +323632*a(n-39) -213988*a(n-40) +127353*a(n-41) -71930*a(n-42) +39628*a(n-43) -15194*a(n-44) +6905*a(n-45) -2853*a(n-46) +1023*a(n-47) -238*a(n-48) +40*a(n-49) for n>54

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A255159

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 15 2015

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 April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)