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A237906 Number of (n+1)X(2+1) 0..3 arrays with the maximum minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
1780, 22128, 271292, 3324618, 40005364, 490622010, 6035315040, 73714662652, 894960497360, 10958078831604, 134325748353732, 1639221669232544, 19979775426322132, 244455206135565428, 2990775177779198728 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237911

LINKS

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

FORMULA

Empirical: a(n) = 490*a(n-3) +12320*a(n-4) +32334*a(n-5) +174761*a(n-6) +728620*a(n-7) -4478227*a(n-8) -7207644*a(n-9) -27000775*a(n-10) -86386386*a(n-11) +547827458*a(n-12) +554856222*a(n-13) +536708856*a(n-14) +1329549296*a(n-15) -23669830297*a(n-16) -6434035554*a(n-17) +56696777905*a(n-18) -15832476910*a(n-19) +164427921697*a(n-20) +62206824756*a(n-21) -828346221747*a(n-22) -204063315132*a(n-23) +1304893695215*a(n-24) +680120199232*a(n-25) -1013570261870*a(n-26) -1248410862186*a(n-27) +90792816132*a(n-28) +976633774310*a(n-29) +607888452553*a(n-30) -146598881908*a(n-31) -552981695101*a(n-32) -391639304456*a(n-33) -26300252816*a(n-34) +231598966342*a(n-35) +224335145560*a(n-36) +43215570986*a(n-37) -60284011665*a(n-38) -57945132090*a(n-39) -18549813839*a(n-40) +6197072112*a(n-41) +6419665863*a(n-42) +2191120924*a(n-43) +363299396*a(n-44) -86845568*a(n-45) -25033872*a(n-46)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A233953 A282404 A167282 * A187524 A253057 A204637

Adjacent sequences:  A237903 A237904 A237905 * A237907 A237908 A237909

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2014

STATUS

approved

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Last modified October 2 06:08 EDT 2022. Contains 357191 sequences. (Running on oeis4.)