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A219829 Number of 2Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 2Xn array 1
10, 13, 38, 87, 176, 370, 721, 1374, 2533, 4538, 7924, 13507, 22510, 36732, 58771, 92312, 142492, 216355, 323411, 476314, 691675, 991027, 1401960, 1959445, 2707367, 3700288, 5005462, 6705125, 8899084, 11707630, 15274801, 19772022, 25402150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A219828

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = (1/40320)*n^8 - (1/3360)*n^7 - (1/2880)*n^6 + (31/240)*n^5 - (7913/5760)*n^4 + (2933/480)*n^3 + (12179/1120)*n^2 - (33527/280)*n + 202 for n>8

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A101215 A102249 A195313 * A062370 A069960 A219715

Adjacent sequences: A219826 A219827 A219828 * A219830 A219831 A219832

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 28 2012

STATUS

approved

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Last modified December 1 18:55 EST 2022. Contains 358475 sequences. (Running on oeis4.)