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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

R. H. Hardin, Table of n, a(n) for n = 1..200

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

Adjacent sequences:  A185473 A185474 A185475 * A185477 A185478 A185479

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 2011

STATUS

approved

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)