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A208198
Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors
1
51, 41272, 39725054, 38372808893, 37069738362057, 35810971705853725, 34594950233928279876, 33420220819293699707599, 32285381308444124871905667, 31189077171790298063795540459, 30129999876244591484571731949842
OFFSET
1,1
COMMENTS
Column 5 of A208201
LINKS
FORMULA
Empirical: a(n) = 928*a(n-1) +38247*a(n-2) -1419908*a(n-3) -25003347*a(n-4) +1012531896*a(n-5) -9450054156*a(n-6) +24082844974*a(n-7) +80821917709*a(n-8) -489140400628*a(n-9) +403243304428*a(n-10) +1648713698424*a(n-11) -3331507779798*a(n-12) +632406681414*a(n-13) +2327643475767*a(n-14) -977046212844*a(n-15) -462110735853*a(n-16) +172474098336*a(n-17) +29511981612*a(n-18) -7270112880*a(n-19) for n>20
EXAMPLE
Some solutions for n=4
..0..0..0..1..0....0..0..0..0..0....0..1..0..0..0....0..1..1..0..0
..0..1..1..0..2....0..1..0..2..0....1..0..0..1..0....0..2..0..0..2
..2..1..2..2..2....1..0..2..0..1....1..0..2..3..1....1..1..3..1..0
..0..1..3..1..3....2..1..3..0..0....3..2..2..1..1....0..1..0..2..3
CROSSREFS
Sequence in context: A200798 A241117 A255832 * A208405 A208412 A198904
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved