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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A255089 Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0 1

%I #4 Feb 14 2015 10:47:01

%S 8830,9989,20972,63535,211945,753882,2657415,9064874,29870755,

%T 97410200,329152995,1150851045,4035690981,13919676261,46779580735,

%U 155303687089,524239667341,1805454881058,6262197444959,21595148012583,73241853998099

%N Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 0

%C Column 6 of A255091

%H R. H. Hardin, <a href="/A255089/b255089.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +26*a(n-3) -55*a(n-4) +28*a(n-5) +860*a(n-6) -936*a(n-7) -728*a(n-8) -22472*a(n-9) +24620*a(n-10) +19824*a(n-11) -59520*a(n-12) +39072*a(n-13) +14560*a(n-14) +1043296*a(n-15) -1063056*a(n-16) -418880*a(n-17) +538408*a(n-18) -104656*a(n-19) +306216*a(n-20) -3854560*a(n-21) +3560576*a(n-22) -8910272*a(n-23) +8340684*a(n-24) +460456*a(n-25) -2283632*a(n-26) +20055272*a(n-27) -17621180*a(n-28) +66236016*a(n-29) -68420284*a(n-30) +2449976*a(n-31) +8962180*a(n-32) +40785168*a(n-33) -50002976*a(n-34) -260319584*a(n-35) +257820144*a(n-36) +2777920*a(n-37) +9561600*a(n-38) +48083200*a(n-39) -57932800*a(n-40) -277724160*a(n-41) +275272704*a(n-42) +2967552*a(n-43) +15676416*a(n-44) +34320384*a(n-45) -50577408*a(n-46) -455196672*a(n-47) +455196672*a(n-48) for n>56

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A255091

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 14 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.

Last modified October 1 18:47 EDT 2023. Contains 365828 sequences. (Running on oeis4.)