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A234782 Number of (n+1)X(4+1) 0..3 arrays with no adjacent elements equal and with each 2X2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases 1
19652, 1269036, 83120724, 5465582060, 359793857812, 23692759265012, 1560344155530604, 102763262525972764, 6767981316129837140, 445739932002608156372, 29356499455959182741884, 1933423944068169976159436 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A234786

LINKS

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

FORMULA

Empirical: a(n) = 115*a(n-1) -4157*a(n-2) +69117*a(n-3) -595705*a(n-4) +2449306*a(n-5) -240335*a(n-6) -43350087*a(n-7) +178528425*a(n-8) -183199822*a(n-9) -751284432*a(n-10) +2871335435*a(n-11) -3549608757*a(n-12) -650892687*a(n-13) +7285361378*a(n-14) -9372087568*a(n-15) +5616780205*a(n-16) -1330498112*a(n-17) -261001088*a(n-18) +232979629*a(n-19) -45081325*a(n-20) -1230938*a(n-21) +1537784*a(n-22) -190656*a(n-23) +8208*a(n-24) -108*a(n-25)

EXAMPLE

Some solutions for n=1

..1..3..1..3..0....1..0..3..1..3....3..0..3..0..3....1..3..1..3..1

..2..1..3..0..1....3..2..0..3..0....1..3..1..2..1....0..2..3..2..0

CROSSREFS

Sequence in context: A118924 A065304 A178782 * A206133 A321825 A186559

Adjacent sequences:  A234779 A234780 A234781 * A234783 A234784 A234785

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2013

STATUS

approved

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Last modified October 18 00:21 EDT 2019. Contains 328135 sequences. (Running on oeis4.)