A266097 Number of nX4 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself.

5, 36, 161, 929, 4893, 26948, 145274, 790986, 4286644, 23281595, 126318252, 685685972, 3721248548, 20197452145, 109618496442, 594950280201, 3229037349370, 17525382955525, 95117628995827, 516243924279843

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