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A209103 Number of 4 X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors. 1
14, 612, 23248, 849548, 30836932, 1118366188, 40556341276, 1470727552508, 53334292149524, 1934110124219172, 70138417396144324, 2543494195954824748, 92237079873229771996, 3344878451059254299004, 121298417878736991992724 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A209100.

LINKS

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

FORMULA

Empirical: a(n) = 61*a(n-1) -1124*a(n-2) +9139*a(n-3) -34187*a(n-4) +44684*a(n-5) +35628*a(n-6) -128720*a(n-7) +102352*a(n-8) -44832*a(n-9) +17472*a(n-10) for n>12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A209100.

Sequence in context: A282053 A209678 A280676 * A283780 A210808 A139196

Adjacent sequences:  A209100 A209101 A209102 * A209104 A209105 A209106

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 05 2012

STATUS

approved

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Last modified August 15 18:38 EDT 2022. Contains 356148 sequences. (Running on oeis4.)