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A222337 Number of n X 4 0..6 arrays with no entry increasing mod 7 by 6 rightwards or downwards, starting with upper left zero. 2
216, 178746, 147918906, 122408393436, 101297497221786, 83827445649884946, 69370328359709445996, 57406526220963704077986, 47506035082750189614687546, 39313010520733216994188515036, 32532978041867113135439462852106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222340.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..109

FORMULA

Empirical: a(n) = 873*a(n-1) - 38091*a(n-2) + 387974*a(n-3).

Empirical g.f.: 6*x*(36 - 1637*x + 16884*x^2) / (1 - 873*x + 38091*x^2 - 387974*x^3). - Colin Barker, Mar 15 2018

EXAMPLE

Some solutions for n=3:

..0..0..2..0....0..2..2..0....0..2..0..0....0..2..0..0....0..2..2..0

..0..3..5..0....0..3..3..0....0..5..3..0....0..0..2..0....0..3..4..0

..0..3..1..1....2..3..3..5....3..3..4..4....3..5..6..3....0..3..0..1

CROSSREFS

Cf. A222340.

Sequence in context: A269821 A268364 A048100 * A008697 A282000 A013785

Adjacent sequences:  A222334 A222335 A222336 * A222338 A222339 A222340

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2013

STATUS

approved

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Last modified September 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)