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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A183767 1/32 the number of (n+1) X 5 binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1. 1
 12, 280, 7392, 205920, 5912192, 173065984, 5134924800, 153876579840, 4646469273600, 141154845511680, 4309194677698560, 132086184685977600, 4062564621910867968, 125316146802859048960, 3875293808717379141632 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirically a(n) = 2^(3*n)*Gamma(2*n+1/2)/(Gamma(n+1/2)*n!). - Peter Luschny, Sep 24 2018 EXAMPLE Some solutions for 3 X 5: ..0..0..1..1..0....0..0..0..1..1....1..0..1..1..1....0..0..0..1..1 ..0..0..0..0..0....1..1..1..1..1....1..1..0..0..1....0..1..1..1..0 ..0..0..0..1..0....0..1..0..0..1....1..1..1..1..1....0..0..0..0..1 CROSSREFS Column 4 of A183772. Sequence in context: A295037 A295528 A166337 * A009604 A154669 A079519 Adjacent sequences: A183764 A183765 A183766 * A183768 A183769 A183770 KEYWORD nonn AUTHOR R. H. Hardin, Jan 06 2011 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 July 18 17:21 EDT 2024. Contains 374388 sequences. (Running on oeis4.)