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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A238040 Number of (n+1)X(2+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
 340, 1944, 10812, 61668, 352180, 1999804, 11359816, 64650988, 367695852, 2090439976, 11887700660, 67607537176, 384454848916, 2186228909392, 12432532688900, 70700318548692, 402048993757740, 2286326651710856 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A238046 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-2) +64*a(n-3) +307*a(n-4) +593*a(n-5) +1251*a(n-6) +1168*a(n-7) -388*a(n-8) -1956*a(n-9) -4912*a(n-10) -2576*a(n-11) +1664*a(n-12) +768*a(n-13) EXAMPLE Some solutions for n=4 ..0..1..2....1..0..0....0..1..1....1..1..2....0..1..1....1..2..1....1..1..1 ..1..0..1....2..0..1....2..2..0....0..0..1....0..0..0....1..0..2....1..2..2 ..0..0..2....0..0..2....2..2..1....0..2..2....2..1..0....2..0..2....1..2..1 ..1..2..2....1..2..0....1..1..0....1..2..2....1..0..2....2..2..1....2..2..1 ..1..1..0....1..1..0....0..2..0....1..0..1....1..0..0....0..1..1....1..1..1 CROSSREFS Sequence in context: A076748 A306865 A205223 * A237959 A232514 A187383 Adjacent sequences: A238037 A238038 A238039 * A238041 A238042 A238043 KEYWORD nonn AUTHOR R. H. Hardin, Feb 17 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.

Last modified August 5 14:23 EDT 2024. Contains 374950 sequences. (Running on oeis4.)