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A237153 Number of (n+1)X(3+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock equal 1
14096, 762508, 39065788, 2178706440, 122764464080, 7033328776428, 405233994691412, 23442673757474096, 1358692280003929896, 78833139820297319076, 4576551403640265608180, 265766661042055353964544 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237158

LINKS

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

FORMULA

Empirical: a(n) = 149*a(n-1) -7971*a(n-2) +165544*a(n-3) +514201*a(n-4) -80314173*a(n-5) +1119086138*a(n-6) +2353971653*a(n-7) -184820183374*a(n-8) +1195717243935*a(n-9) +7121767253646*a(n-10) -109236673637011*a(n-11) +151091595287238*a(n-12) +3146739450435147*a(n-13) -12340993650546304*a(n-14) -35536984802131697*a(n-15) +240979612131734495*a(n-16) +151218340006622456*a(n-17) -2409462261147296355*a(n-18) +214663115768358527*a(n-19) +14616659743291780241*a(n-20) -4465686520136547226*a(n-21) -57198163922758996002*a(n-22) +17039320101208544920*a(n-23) +146671703056688867968*a(n-24) -28570447814109231520*a(n-25) -245285612789187739552*a(n-26) +15003016836137771136*a(n-27) +261875539621553974784*a(n-28) +18764289131957794816*a(n-29) -170469142709804072960*a(n-30) -31680390599580352512*a(n-31) +61954278384892772352*a(n-32) +16293323636687241216*a(n-33) -10908963608341774336*a(n-34) -2882631151455830016*a(n-35) +965960077255114752*a(n-36) +165159806271750144*a(n-37) -40928839307624448*a(n-38)

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A254191 A254184 A253796 * A066698 A035918 A157786

Adjacent sequences:  A237150 A237151 A237152 * A237154 A237155 A237156

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2014

STATUS

approved

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Last modified August 7 15:30 EDT 2020. Contains 336276 sequences. (Running on oeis4.)