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A250689 Number of (n+1)X(6+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction 1
193117, 995624, 5098590, 25235016, 117793753, 523260542, 2224688673, 9121206688, 36332194553, 141502429478, 541706838601, 2047265474206, 7665603013743, 28522048068276, 105725887121051, 391286691949576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A250691

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..90

FORMULA

Empirical: a(n) = 27*a(n-1) -331*a(n-2) +2439*a(n-3) -12049*a(n-4) +42129*a(n-5) -107225*a(n-6) +201069*a(n-7) -277706*a(n-8) +278928*a(n-9) -197984*a(n-10) +94032*a(n-11) -26784*a(n-12) +3456*a(n-13) for n>17

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A187676 A187674 A252950 * A234196 A234197 A234191

Adjacent sequences:  A250686 A250687 A250688 * A250690 A250691 A250692

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 2014

STATUS

approved

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Last modified September 25 12:47 EDT 2020. Contains 337344 sequences. (Running on oeis4.)