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A318543 Number of nX6 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
13, 15, 52, 207, 784, 2905, 10496, 38721, 144148, 531780, 1960675, 7241505, 26745797, 98766587, 364682042, 1346615672, 4972655637, 18362061797, 67803976370, 250374735252, 924538580895, 3413971260050, 12606503235153 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A318545.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +24*a(n-3) +20*a(n-4) +96*a(n-5) +2*a(n-6) +103*a(n-7) -209*a(n-8) -11*a(n-9) -287*a(n-10) +65*a(n-11) +298*a(n-12) -154*a(n-13) +475*a(n-14) +73*a(n-15) -898*a(n-16) -83*a(n-17) +533*a(n-18) +215*a(n-19) -197*a(n-20) -209*a(n-21) +353*a(n-22) +119*a(n-23) -885*a(n-24) +190*a(n-25) +1077*a(n-26) -441*a(n-27) -760*a(n-28) +403*a(n-29) +336*a(n-30) -210*a(n-31) -91*a(n-32) +66*a(n-33) +14*a(n-34) -12*a(n-35) -a(n-36) +a(n-37) for n>38

EXAMPLE

Some solutions for n=5

..0..0..0..0..0..0. .0..0..0..0..0..0. .0..1..0..0..0..0. .0..0..0..0..0..0

..0..0..0..0..1..0. .0..0..1..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0

..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .1..0..0..0..0..0

..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..0..0. .0..0..1..0..0..1

..0..0..0..0..1..0. .0..1..0..0..1..0. .0..0..0..0..0..0. .0..0..0..0..0..0

CROSSREFS

Cf. A318545.

Sequence in context: A108257 A217252 A299593 * A302001 A109018 A237912

Adjacent sequences:  A318540 A318541 A318542 * A318544 A318545 A318546

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 28 2018

STATUS

approved

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Last modified May 26 17:16 EDT 2022. Contains 354092 sequences. (Running on oeis4.)