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A237774 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
1176, 7220, 44224, 241036, 1618456, 10751680, 75418228, 465173744, 3176256972, 21049234848, 147328887252, 921968552116, 6322252216966, 41542722431956, 289897758698800, 1827881244483108, 12568775829371758, 82064904769569132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237779

LINKS

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

FORMULA

Empirical: a(n) = 1890*a(n-4) +11436*a(n-6) -297317*a(n-8) -1964276*a(n-10) +14369445*a(n-12) +101694144*a(n-14) -182013563*a(n-16) -1485295098*a(n-18) +1261787279*a(n-20) +7944769616*a(n-22) -6190719967*a(n-24) -10223487242*a(n-26) +8861140786*a(n-28) +4411410330*a(n-30) -7175325372*a(n-32) +2763746512*a(n-34) +683460326*a(n-36) -1158240208*a(n-38) +99695884*a(n-40) +172729392*a(n-42) -44372896*a(n-44) +3735360*a(n-46) +487680*a(n-48) -9216*a(n-50) for n>55

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A204755 A202199 A233870 * A223340 A270147 A270114

Adjacent sequences:  A237771 A237772 A237773 * A237775 A237776 A237777

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 13 2014

STATUS

approved

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Last modified September 19 03:31 EDT 2021. Contains 347550 sequences. (Running on oeis4.)