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A235217 Number of (n+1)X(2+1) 0..2 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both 1
427, 8029, 145669, 2667851, 48751703, 891368897, 16295474229, 297913907755, 5446419329019, 99570851829557, 1820342723277569, 33279297670712375, 608408300083251131, 11122850784139833541, 203346682381621540533 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235223

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) +52*a(n-2) -188*a(n-3) -10*a(n-4) +188*a(n-5) -29*a(n-6) -40*a(n-7) +10*a(n-8)

EXAMPLE

Some solutions for n=3

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

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

..2..2..2....1..2..2....1..1..1....1..2..1....1..1..1....2..2..2....1..2..1

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

CROSSREFS

Sequence in context: A054984 A251147 A095811 * A236383 A224668 A030467

Adjacent sequences:  A235214 A235215 A235216 * A235218 A235219 A235220

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified November 14 23:06 EST 2018. Contains 317221 sequences. (Running on oeis4.)