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

 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 60, we have over 367,000 sequences, and we’ve crossed 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A227677 Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order 1
 11, 131, 1343, 11971, 90884, 592791, 3380440, 17161921, 78807477, 331649881, 1292860261, 4709556398, 16147197916, 52422604429, 161978060979, 478412562214, 1355794408584, 3698766477709, 9741946309658, 24835300279682, 61420677587519 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A227679 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical polynomial of degree 30 FORMULA Empirical polynomial of degree 30 (see link above) EXAMPLE Some solutions for n=4 ..1..0..0..1....0..1..0..1....0..0..0..0....0..1..0..1....0..1..1..0 ..0..1..1..1....1..0..0..1....1..0..1..0....1..0..1..0....1..0..0..1 ..1..1..0..0....0..1..1..0....0..0..0..1....1..0..0..1....0..1..1..0 ..0..1..0..0....0..0..1..0....1..1..1..0....0..0..0..0....0..0..0..0 CROSSREFS Sequence in context: A083763 A185127 A287295 * A302759 A076255 A076357 Adjacent sequences: A227674 A227675 A227676 * A227678 A227679 A227680 KEYWORD nonn AUTHOR R. H. Hardin Jul 19 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 2 02:40 EST 2023. Contains 367505 sequences. (Running on oeis4.)