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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A207586 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically 1
16, 256, 324, 1098, 3094, 7272, 18150, 46716, 116932, 285200, 697034, 1720944, 4216816, 10262124, 25016808, 61035720, 148655892, 361558434, 879459498, 2139482884, 5202203050, 12645158420, 30736681900, 74709969008, 181571105898 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A207589

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +16*a(n-3) -8*a(n-4) -a(n-5) -125*a(n-6) +12*a(n-7) -59*a(n-8) +561*a(n-9) +15*a(n-10) +394*a(n-11) -1588*a(n-12) -30*a(n-13) -1252*a(n-14) +3110*a(n-15) -240*a(n-16) +2220*a(n-17) -4681*a(n-18) +1113*a(n-19) -2172*a(n-20) +5890*a(n-21) -2305*a(n-22) +689*a(n-23) -6463*a(n-24) +2868*a(n-25) +1071*a(n-26) +5999*a(n-27) -2424*a(n-28) -1723*a(n-29) -4358*a(n-30) +1491*a(n-31) +1167*a(n-32) +2335*a(n-33) -642*a(n-34) -411*a(n-35) -928*a(n-36) +157*a(n-37) +60*a(n-38) +289*a(n-39) -3*a(n-40) +6*a(n-41) -71*a(n-42) -9*a(n-43) -3*a(n-44) +12*a(n-45) +2*a(n-46) -a(n-48) for n>50

EXAMPLE

Some solutions for n=4

..1..1..1..0..0....0..1..1..0..0....1..1..0..1..0....1..0..1..0..0

..0..1..0..1..1....1..0..1..1..1....1..0..1..0..0....0..1..0..1..1

..1..0..1..0..1....0..1..0..1..0....0..1..0..1..0....1..0..1..0..1

..1..0..1..1..0....0..1..1..0..0....1..0..1..1..0....0..1..0..1..0

CROSSREFS

Sequence in context: A171321 A077412 A208498 * A208071 A206984 A207842

Adjacent sequences: A207583 A207584 A207585 * A207587 A207588 A207589

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 19 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 November 27 07:59 EST 2022. Contains 358362 sequences. (Running on oeis4.)