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A232573 Number of (n+1)X(2+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, vertically or antidiagonally 1
72, 1064, 16316, 265670, 4252876, 67979266, 1090643352, 17469440576, 279889357176, 4484766979158, 71855180523860, 1151291899304218, 18446489829419748, 295556353549647088, 4735518134130583640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A232579

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +133*a(n-2) +898*a(n-3) +1301*a(n-4) -5200*a(n-5) -10703*a(n-6) +3428*a(n-7) -1089631*a(n-8) -199930*a(n-9) +4385413*a(n-10) +20845860*a(n-11) +28031898*a(n-12) -220854540*a(n-13) -102914934*a(n-14) +1092711772*a(n-15) -376388671*a(n-16) -1898829704*a(n-17) +2499228555*a(n-18) -1362129714*a(n-19) -3015536791*a(n-20) +6548644648*a(n-21) +1241905557*a(n-22) -13074485456*a(n-23) +20315868387*a(n-24) -26549602146*a(n-25) +13961634587*a(n-26) -8938694500*a(n-27) +1010632952*a(n-28) +504496900*a(n-29) -528346112*a(n-30) +145246080*a(n-31) +2522156*a(n-32) -33648304*a(n-33) -14570624*a(n-34) +13149248*a(n-35) -3183872*a(n-36) +239616*a(n-37) for n>38

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A250423 A250650 A008399 * A022148 A192847 A064567

Adjacent sequences:  A232570 A232571 A232572 * A232574 A232575 A232576

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 2013

STATUS

approved

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Last modified January 16 06:59 EST 2019. Contains 319188 sequences. (Running on oeis4.)