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A251402 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 8
226, 3205, 3205, 45542, 165498, 45542, 647154, 8558283, 8558283, 647154, 9195809, 442476530, 1606734480, 442476530, 9195809, 130668665, 22875877611, 301644677965, 301644677965, 22875877611, 130668665, 1856748750 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....226........3205..........45542.............647154...............9195809

....3205......165498........8558283..........442476530...........22875877611

...45542.....8558283.....1606734480.......301644677965........56631282128854

..647154...442476530...301644677965....205729518595782....140311657486510902

.9195809.22875877611.56631282128854.140311657486510902.347621346436641654516

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..112

FORMULA

Empirical for column k:

k=1: a(n) = 16*a(n-1) -30*a(n-2) +69*a(n-3) -62*a(n-4) +30*a(n-5) -8*a(n-6) +a(n-7)

k=2: [order 25]

k=3: [order 81]

EXAMPLE

Some solutions for n=2 k=4

..0..0..1..0..2....2..2..2..2..1....0..0..0..3..3....2..0..0..1..1

..0..2..2..2..1....0..0..2..0..3....0..0..2..3..2....0..0..0..1..0

..2..0..0..3..1....0..0..2..3..0....0..0..3..2..2....0..0..1..1..1

CROSSREFS

Sequence in context: A156814 A233943 A234155 * A251395 A251507 A251500

Adjacent sequences:  A251399 A251400 A251401 * A251403 A251404 A251405

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Dec 02 2014

STATUS

approved

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Last modified April 3 01:31 EDT 2020. Contains 333195 sequences. (Running on oeis4.)