login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A236350 Number of (n+1)X(2+1) 0..2 arrays colored with the sum of the upper and lower median values of each 2X2 subblock 1
462, 3684, 27836, 220560, 1773948, 14076412, 111309712, 884028160, 7024666376, 55750690252, 442430381216, 3512371728624, 27883460665424, 221335028705752, 1756948824977084, 13946977001389640, 110712894043043324 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236354

LINKS

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

FORMULA

Empirical: a(n) = 24*a(n-2) +174*a(n-3) +967*a(n-4) +1500*a(n-5) -1888*a(n-6) -18876*a(n-7) -51836*a(n-8) +27597*a(n-9) +257456*a(n-10) +78401*a(n-11) -251174*a(n-12) +340704*a(n-13) -895615*a(n-14) -3093453*a(n-15) +2940769*a(n-16) +6734039*a(n-17) -3709367*a(n-18) -4102971*a(n-19) -657304*a(n-20) -5725285*a(n-21) +9970384*a(n-22) +9347337*a(n-23) -11796132*a(n-24) -18284*a(n-25) +2908512*a(n-26) -4975360*a(n-27) +1382528*a(n-28) -988800*a(n-29) +166400*a(n-30) +157696*a(n-31) for n>32

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A267567 A267557 A154056 * A027816 A027823 A194718

Adjacent sequences:  A236347 A236348 A236349 * A236351 A236352 A236353

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 23 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 22 18:56 EDT 2021. Contains 347608 sequences. (Running on oeis4.)