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!)
A251404 Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock summing to a prime 1
238, 2164, 19654, 179400, 1634286, 14919346, 136033976, 1241601558, 11324851298, 103347731602, 942800497790, 8602989816444, 78487649036798, 716159657613444, 6533986460840950, 59617758968511628, 543941703260044888 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A251410
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) +60*a(n-2) -452*a(n-3) -649*a(n-4) +5937*a(n-5) +916*a(n-6) -23417*a(n-7) +4582*a(n-8) +26384*a(n-9) -7348*a(n-10) -1208*a(n-11) +48*a(n-12)
EXAMPLE
Some solutions for n=4
..0..1..1....1..0..0....0..2..0....0..2..0....0..2..1....0..1..0....0..2..0
..1..0..1....2..0..2....2..1..2....1..2..1....2..1..1....2..0..1....2..1..2
..0..2..2....2..1..2....0..2..0....1..1..1....2..0..0....1..0..2....1..1..1
..1..0..1....2..2..0....0..1..2....1..0..1....0..1..1....0..1..2....1..0..0
..1..0..1....0..1..0....0..1..1....0..1..1....1..1..2....2..2..0....1..1..2
CROSSREFS
Sequence in context: A252905 A122266 A286213 * A238602 A279274 A282812
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2014
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 March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)