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!)
A234202 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 15 1
440, 1732, 6644, 28016, 115680, 509536, 2169836, 9814536, 42498000, 195663360, 856196216, 3992938424, 17600721348, 82886620036, 367331112116, 1742966235544, 7755822204860, 37017397272612, 165231545698596, 792217800373064 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A234208

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +35*a(n-2) -651*a(n-3) +419*a(n-4) +16705*a(n-5) -37770*a(n-6) -216562*a(n-7) +772034*a(n-8) +1449450*a(n-9) -8226531*a(n-10) -3432396*a(n-11) +53203704*a(n-12) -19299470*a(n-13) -221565837*a(n-14) +197415839*a(n-15) +605551158*a(n-16) -820429189*a(n-17) -1065993213*a(n-18) +2055641766*a(n-19) +1094316298*a(n-20) -3372056546*a(n-21) -351098112*a(n-22) +3691267180*a(n-23) -636122040*a(n-24) -2662114168*a(n-25) +998183888*a(n-26) +1207919856*a(n-27) -667852864*a(n-28) -308559296*a(n-29) +239536384*a(n-30) +30592768*a(n-31) -43737088*a(n-32) +2252800*a(n-33) +3080192*a(n-34) -458752*a(n-35)

EXAMPLE

Some solutions for n=5

..0..1..0....0..1..4....0..0..0....4..0..1....1..0..4....4..1..0....1..0..5

..5..1..5....5..1..5....5..0..5....1..4..4....5..1..4....1..5..1....5..1..1

..1..4..1....0..1..4....3..3..3....5..1..0....1..4..0....4..1..0....1..0..5

..5..1..5....5..1..5....0..5..0....4..1..5....5..1..4....5..1..5....5..1..1

..5..2..5....0..1..0....5..5..5....4..0..1....1..0..4....4..1..4....1..4..5

..1..5..1....1..5..1....5..0..5....4..5..1....5..1..4....4..0..4....5..1..1

CROSSREFS

Sequence in context: A158319 A250879 A247722 * A061626 A187239 A272716

Adjacent sequences:  A234199 A234200 A234201 * A234203 A234204 A234205

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 2013

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 October 28 12:48 EDT 2020. Contains 338055 sequences. (Running on oeis4.)