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!)
A236713 Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the lower median of every 2X2 subblock 1
398, 2262, 12276, 68906, 391672, 2259386, 12874198, 73197080, 418190364, 2392155730, 13641003160, 77798447248, 444313934342, 2536940776320, 14475829142936, 82619028156938, 471664099792988, 2692274158653134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236719

LINKS

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

FORMULA

Empirical: a(n) = 75*a(n-3) +429*a(n-4) +897*a(n-5) +2057*a(n-6) -888*a(n-7) -8682*a(n-8) -14634*a(n-9) -20920*a(n-10) +12981*a(n-11) +9538*a(n-12) -11151*a(n-13) +92172*a(n-14) +24265*a(n-15) +109712*a(n-16) +362941*a(n-17) -258335*a(n-18) -1201467*a(n-19) -103220*a(n-20) +1386852*a(n-21) +424193*a(n-22) -333799*a(n-23) -68373*a(n-24) +164001*a(n-25) +390188*a(n-26) -504798*a(n-27) -533076*a(n-28) +591269*a(n-29) +238719*a(n-30) -346836*a(n-31) -97052*a(n-32) +11666*a(n-33) -23198*a(n-34) -4960*a(n-35) -260*a(n-36) for n>38

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A327592 A191942 A158316 * A235958 A187515 A235569

Adjacent sequences:  A236710 A236711 A236712 * A236714 A236715 A236716

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 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 July 8 08:08 EDT 2020. Contains 335520 sequences. (Running on oeis4.)