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A266097 Number of nX4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself. 1
5, 36, 161, 929, 4893, 26948, 145274, 790986, 4286644, 23281595, 126318252, 685685972, 3721248548, 20197452145, 109618496442, 594950280201, 3229037349370, 17525382955525, 95117628995827, 516243924279843 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A266101.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +24*a(n-2) +17*a(n-3) -89*a(n-4) -40*a(n-5) +146*a(n-6) +18*a(n-7) -82*a(n-8) -6*a(n-9) -8*a(n-10) +36*a(n-11) -13*a(n-12) +a(n-13) -2*a(n-14) +a(n-15) for n>16

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266101.

Sequence in context: A063417 A109726 A272561 * A196714 A048535 A272150

Adjacent sequences:  A266094 A266095 A266096 * A266098 A266099 A266100

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 2015

STATUS

approved

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Last modified June 23 23:00 EDT 2021. Contains 345402 sequences. (Running on oeis4.)