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A251397 Number of (n+1)X(3+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 1
45542, 8558283, 1606734480, 301644677965, 56631282128854, 10632092711682548, 1996093452861010528, 374751133066799206981, 70356632879370619403610, 13208914836753861239922613, 2479871817922719729400520215 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A251402

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 81

FORMULA

Empirical recurrence of order 81 (see link above)

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A269900 A287250 A253045 * A184473 A157653 A202915

Adjacent sequences:  A251394 A251395 A251396 * A251398 A251399 A251400

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2014

STATUS

approved

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Last modified August 16 15:34 EDT 2022. Contains 356168 sequences. (Running on oeis4.)