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!)
A232520 Number of (5+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal 1
28, 3052, 1344, 145682, 64290, 7059918, 3267824, 342080372, 164573398, 16574068036, 8286633666, 803051212486, 416590808466, 38909815282520, 20916002463392, 1885291607431678, 1048847985892576, 91348421012547690 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A232515

LINKS

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

FORMULA

Empirical: a(n) = 46*a(n-2) +a(n-3) +184*a(n-4) +21*a(n-5) -3129*a(n-6) -1083*a(n-7) -3837*a(n-8) -5042*a(n-9) +64552*a(n-10) +42441*a(n-11) -10740*a(n-12) +85083*a(n-13) -472265*a(n-14) -520288*a(n-15) +646440*a(n-16) +58606*a(n-17) +990947*a(n-18) +2531329*a(n-19) -2663947*a(n-20) -3853362*a(n-21) +526235*a(n-22) -243166*a(n-23) +2238796*a(n-24) +3874611*a(n-25) +231546*a(n-26) -428600*a(n-27) -2131424*a(n-28) -2004356*a(n-29) -566543*a(n-30) -430671*a(n-31) +1095449*a(n-32) +666920*a(n-33) +98319*a(n-34) +117471*a(n-35) -169012*a(n-36) -48051*a(n-37) -37792*a(n-38) -23820*a(n-39) +12960*a(n-40) -2700*a(n-41) +3600*a(n-42)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A107444 A277657 A285151 * A061787 A235458 A128506

Adjacent sequences:  A232517 A232518 A232519 * A232521 A232522 A232523

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 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 September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)