login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206050 Number of (n+1)X5 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one 1
7041, 180195, 4256868, 99399924, 2308027074, 53518920690, 1240395191991, 28744156779339, 666068301911073, 15434109289329492, 357636968027315673, 8287100648523035178, 192027148023559498374, 4449616587549453480153 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A206054

LINKS

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

FORMULA

Empirical: a(n) = 36*a(n-1) -219*a(n-2) -3422*a(n-3) +37851*a(n-4) +59870*a(n-5) -1891840*a(n-6) +2993871*a(n-7) +43489357*a(n-8) -153973777*a(n-9) -448171340*a(n-10) +2886518872*a(n-11) +614484491*a(n-12) -27988642084*a(n-13) +30796257251*a(n-14) +149763089102*a(n-15) -329125675452*a(n-16) -403599878248*a(n-17) +1689166897434*a(n-18) +86297883518*a(n-19) -5122702486325*a(n-20) +3208152883621*a(n-21) +9229930244915*a(n-22) -11507913803738*a(n-23) -8249392965144*a(n-24) +20351491472398*a(n-25) -424045644155*a(n-26) -22701658457583*a(n-27) +11970329458650*a(n-28) +16509522154114*a(n-29) -18881474957145*a(n-30) -3600030294956*a(n-31) +12424769263635*a(n-32) -2684697625456*a(n-33) -3144213018500*a(n-34) +1567428910588*a(n-35) -98343947326*a(n-36) -91221023071*a(n-37) +96482807144*a(n-38) -52729523588*a(n-39) +9525869652*a(n-40) +885701841*a(n-41) -443275303*a(n-42) -66107024*a(n-43) +22913140*a(n-44) -2873160*a(n-45)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A236061 A317399 A116278 * A116332 A234545 A250850

Adjacent sequences:  A206047 A206048 A206049 * A206051 A206052 A206053

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 03 2012

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 6 20:00 EDT 2022. Contains 357270 sequences. (Running on oeis4.)