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A185476 Number of (n+2)X10 0..2 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order 1
636698, 6763143, 46732687, 247920339, 1090826214, 4179700035, 14425457557, 45945546278, 137459779979, 391292289484, 1069448946626, 2823755277643, 7231630113468, 18008053766767, 43669946969427, 103231986144218 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 8 of A185477
LINKS
FORMULA
Empirical: a(n) = (1/3655545353349120000)*n^23
+ (97/1543957043650560000)*n^22
+ (43/6288115959595008)*n^21
+ (37903/80205560709120000)*n^20
+ (4363319/187146308321280000)*n^19
+ (111930887/128047474114560000)*n^18
+ (173896301/6722492391014400)*n^17
+ (999595589/1614043791360000)*n^16
+ (966949557157/79088145776640000)*n^15
+ (2303051708719/11298306539520000)*n^14
+ (762601942063/254936147558400)*n^13
+ (260118396674119/6373403688960000)*n^12
+ (6455418497147533/12167407042560000)*n^11
+ (10938624786824941/1738201006080000)*n^10
+ (15334472267219503/243348140851200)*n^9
+ (54278261336966987/108637562880000)*n^8
+ (9086167557375919/3017710080000)*n^7
+ (11925742307499655463/889218570240000)*n^6
+ (6823870134571712569/157688093122560)*n^5
+ (7908447122576853679/78218300160000)*n^4
+ (17170767258622048961/100380151872000)*n^3
+ (406964817911133233/2151003254400)*n^2
+ (2131730921383/19612560)*n
+ 6377
EXAMPLE
Some solutions for 4X10
..0..0..0..0..0..0..0..0..0..2....0..0..0..0..0..0..0..0..0..2
..0..0..0..0..0..0..0..0..2..2....0..0..0..0..0..0..0..0..1..2
..0..0..0..0..0..1..1..2..1..2....0..0..0..0..0..0..2..2..0..0
..0..0..0..0..0..2..2..2..2..2....0..0..0..0..1..1..2..2..1..1
CROSSREFS
Sequence in context: A251564 A066590 A237909 * A237903 A250674 A210142
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 28 2011
STATUS
approved

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)