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A233875 T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21 7
224, 1176, 1176, 5984, 5404, 5984, 34416, 26488, 26488, 34416, 189632, 155104, 139880, 155104, 189632, 1128928, 909408, 907940, 907940, 909408, 1128928, 6414208, 5878272, 6146640, 6887232, 6146640, 5878272, 6414208, 38622656 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........224........1176.........5984........34416........189632.......1128928

.......1176........5404........26488.......155104........909408.......5878272

.......5984.......26488.......139880.......907940.......6146640......46051092

......34416......155104.......907940......6887232......57147272.....530983144

.....189632......909408......6146640.....57147272.....608085728....7353231356

....1128928.....5878272.....46051092....530983144....7353231356..117645672328

....6414208....36964980....343425768...5012939992...91827779048.1973200783776

...38622656...249710396...2756337624..50952500976.1235220618536

..222041856..1622032500..21588683624.512188465988

.1341849472.11215026376.180216035036

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 14]

k=2: [order 71]

EXAMPLE

Some solutions for n=3 k=4

..0..7..7..7..6....0..4..1..4..7....0..1..1..7..1....0..3..0..7..1

..0..0..7..0..6....4..7..1..7..1....1..7..4..1..0....0..6..6..6..3

..7..0..0..0..3....7..1..4..1..4....4..7..1..7..1....3..0..3..0..6

..3..3..6..3..7....4..1..7..7..1....1..1..0..1..0....6..6..6..6..3

CROSSREFS

Sequence in context: A158227 A061524 A156813 * A233869 A146745 A015048

Adjacent sequences:  A233872 A233873 A233874 * A233876 A233877 A233878

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified September 17 14:07 EDT 2021. Contains 347478 sequences. (Running on oeis4.)