The On-Line Encyclopedia of Integer Sequences (OEIS)

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A206318

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero
(history; published version)

#5 by Russ Cox at Sat Mar 31 12:37:11 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Feb 06 2012

Discussion

Sat Mar 31

12:37

OEIS Server: https://oeis.org/edit/global/875

#4 by Ron Hardin at Mon Feb 06 06:42:36 EST 2012

STATUS

editing

approved

#3 by Ron Hardin at Mon Feb 06 06:42:28 EST 2012

LINKS

R. H. Hardin, <a href="/A206318/b206318.txt">Table of n, a(n) for n = 1..144</a>

#2 by Ron Hardin at Mon Feb 06 06:42:08 EST 2012

NAME

allocated for Ron HardinT(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

DATA

112, 873, 873, 6831, 14990, 6831, 53463, 258452, 258452, 53463, 418468, 4466450, 9841886, 4466450, 418468, 3275406, 77132181, 375274347, 375274347, 77132181, 3275406, 25637095, 1332632711, 14309749540, 31585648103, 14309749540

OFFSET

1,1

COMMENTS

Table starts

.......112..........873............6831...............53463

.......873........14990..........258452.............4466450

......6831.......258452.........9841886...........375274347

.....53463......4466450.......375274347.........31585648103

....418468.....77132181.....14309749540.......2656145209648

...3275406...1332632711....545678293613.....223458785606871

..25637095..23019152735..20808377921080...18792437854613234

.200665376.397663246671.793485464714845.1580709874695673480

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

KEYWORD

allocated

nonn,tabl

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 06 2012

STATUS

approved

editing

#1 by Ron Hardin at Mon Feb 06 06:32:25 EST 2012

NAME

allocated for Ron Hardin

KEYWORD

allocated

STATUS

approved