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

193117, 995624, 5098590, 25235016, 117793753, 523260542, 2224688673, 9121206688, 36332194553, 141502429478, 541706838601, 2047265474206, 7665603013743, 28522048068276, 105725887121051, 391286691949576

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