login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A233718 Number of (n+1)X(1+1) 0..7 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 26 1
280, 1820, 11016, 68828, 423220, 2624872, 16201200, 100277820, 619644916, 3832773404, 23693063108, 146517647480, 905857050536, 5601325392044, 34632490183556, 214141349297724, 1324043851903528, 8186789590614456 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233724

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +58*a(n-2) -58*a(n-3) -1227*a(n-4) +461*a(n-5) +12296*a(n-6) +722*a(n-7) -62278*a(n-8) -22804*a(n-9) +155159*a(n-10) +90798*a(n-11) -162636*a(n-12) -121112*a(n-13) +35968*a(n-14) +28416*a(n-15) -1152*a(n-16)

EXAMPLE

Some solutions for n=4

..5..6....6..7....3..4....3..0....5..5....4..4....0..4....1..3....1..4....2..2

..5..2....3..7....7..4....5..2....6..2....3..7....1..1....3..6....3..1....3..6

..5..1....6..6....4..6....5..1....5..2....6..6....5..4....3..7....6..3....2..6

..4..1....2..5....1..4....5..2....3..0....2..5....1..4....3..6....4..1....3..6

..2..4....5..3....4..6....6..6....3..4....5..7....5..4....5..3....5..1....1..3

CROSSREFS

Sequence in context: A234905 A187178 A233724 * A272982 A234458 A234452

Adjacent sequences:  A233715 A233716 A233717 * A233719 A233720 A233721

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 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 November 15 18:59 EST 2019. Contains 329149 sequences. (Running on oeis4.)