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!)
A303453 Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
16, 512, 12340, 306448, 7626768, 189837638, 4726484016, 117683035940, 2930192820802, 72959325822554, 1816628170742222, 45232591915361348, 1126255602340846336, 28042870875767777390, 698245243223443816298 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A303456.
LINKS
FORMULA
Empirical: a(n) = 28*a(n-1) -39*a(n-2) -673*a(n-3) -7831*a(n-4) +13152*a(n-5) +196214*a(n-6) +926755*a(n-7) -893464*a(n-8) -13994255*a(n-9) -42382981*a(n-10) +17140014*a(n-11) +373492175*a(n-12) +928613637*a(n-13) +282111616*a(n-14) -4237524647*a(n-15) -11369471860*a(n-16) -9985248178*a(n-17) +17442507044*a(n-18) +68265116747*a(n-19) +92330842512*a(n-20) +22423267806*a(n-21) -143116781632*a(n-22) -290878306168*a(n-23) -279434051729*a(n-24) -76373597104*a(n-25) +207774325051*a(n-26) +383113678476*a(n-27) +283454896488*a(n-28) -87112543739*a(n-29) -438258232360*a(n-30) -394716978521*a(n-31) +18057578774*a(n-32) +316959155044*a(n-33) +214805036106*a(n-34) -28619190824*a(n-35) -94398747368*a(n-36) -23874979472*a(n-37) +20190067380*a(n-38) +12196646640*a(n-39) -1210063296*a(n-40) -2962657472*a(n-41) -765333392*a(n-42) +128606600*a(n-43) +62302928*a(n-44) -9578208*a(n-45) -3013216*a(n-46) +233600*a(n-47)
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..1..0. .0..0..0..0..1. .0..0..1..0..1. .0..0..0..1..1
..0..1..1..1..1. .1..0..1..0..0. .1..1..1..1..1. .1..0..1..1..0
..1..1..1..0..0. .0..0..0..0..0. .0..0..1..0..1. .1..0..1..0..0
..0..0..1..1..0. .0..0..1..0..1. .1..0..0..0..0. .1..1..0..0..0
CROSSREFS
Cf. A303456.
Sequence in context: A147641 A300801 A268147 * A303459 A301440 A302012
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 24 2018
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 April 13 05:19 EDT 2024. Contains 371639 sequences. (Running on oeis4.)