The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A227255 Number of nX5 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
 11, 53, 450, 4578, 44379, 385212, 2925969, 19641271, 118614860, 654214381, 3334753195, 15858202072, 70892618881, 299805425605, 1205758757487, 4632388331446, 17066069541973, 60489294799563, 206864212649513 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A227256 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical polynomial of degree 47 FORMULA Empirical polynomial of degree 47 (see link above) EXAMPLE Some solutions for n=4 ..1..1..1..0..0....1..1..1..0..1....1..1..0..0..0....1..1..1..1..1 ..1..1..0..1..1....1..0..0..1..1....1..0..1..1..1....1..1..1..0..0 ..1..1..1..1..1....0..1..1..0..1....1..1..1..1..1....1..1..0..0..0 ..1..0..0..1..1....1..1..0..1..0....1..0..1..1..0....1..0..0..0..0 CROSSREFS Sequence in context: A227965 A196468 A252833 * A104291 A172495 A003867 Adjacent sequences:  A227252 A227253 A227254 * A227256 A227257 A227258 KEYWORD nonn AUTHOR R. H. Hardin Jul 04 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.

Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)