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

462, 3684, 27836, 220560, 1773948, 14076412, 111309712, 884028160, 7024666376, 55750690252, 442430381216, 3512371728624, 27883460665424, 221335028705752, 1756948824977084, 13946977001389640, 110712894043043324

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 * A364848 A027816 A027823

Adjacent sequences: A236347 A236348 A236349 * A236351 A236352 A236353

Keyword

nonn

Author

R. H. Hardin, Jan 23 2014

Status

approved