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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A256954 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically 8

%I

%S 512,2554,2554,10732,13349,10732,42890,66542,66542,42890,154680,

%T 262251,319819,262251,154680,516998,844499,1015815,1015815,844499,

%U 516998,1640073,2396710,2663867,2782301,2663867,2396710,1640073,5004712,6268245

%N T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically

%C Table starts

%C ......512.....2554....10732....42890...154680...516998...1640073...5004712

%C .....2554....13349....66542...262251...844499..2396710...6268245..15240141

%C ....10732....66542...319819..1015815..2663867..6028589..12037534..21294643

%C ....42890...262251..1015815..2782301..6304044.11484877..18040804..26715881

%C ...154680...844499..2663867..6304044.11818550.18296498..26587024..37470100

%C ...516998..2396710..6028589.11484877.18296498.27007866..38735508..53251874

%C ..1640073..6268245.12037534.18040804.26587024.38735508..56306098..77953860

%C ..5004712.15240141.21294643.26715881.37470100.53251874..77953860.109071370

%C .14785630.34366037.35521186.40022560.53161612.73958136.108710066.152280580

%C .42521002.73532563.57234252.56292649.69050742.97824928.143899574.203558922

%H R. H. Hardin, <a href="/A256954/b256954.txt">Table of n, a(n) for n = 1..1984</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 21] for n>27

%F k=2: [order 50] for n>63

%F k=3: [order 29] for n>47

%F k=4: [order 22] for n>39

%F k=5: [order 17] for n>35

%F k=6: [same order 17] for n>35

%F k=7: [same order 17] for n>37

%e Some solutions for n=2 k=4

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

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

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

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

%Y Column 1 is A255029

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Apr 13 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 June 28 21:04 EDT 2022. Contains 354907 sequences. (Running on oeis4.)