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

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A222900 Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
 1, 4, 14, 75, 411, 2522, 15919, 103627, 683480, 4554799, 30542304, 205785953, 1391485044, 9436529666, 64150640719, 437015936703, 2982527052975, 20387828050502, 139566607631735, 956650211233825, 6564964362464004 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 2 of A222906 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=3 ..0..0....0..0....0..1....0..0....0..1....0..0....0..0....0..1....0..0....0..0 ..1..2....0..0....1..1....0..1....0..0....0..1....0..0....2..2....1..0....0..0 ..2..2....0..0....1..1....0..0....0..0....1..1....1..2....2..2....0..0....1..0 CROSSREFS Sequence in context: A088127 A242739 A007282 * A222485 A009347 A231510 Adjacent sequences:  A222897 A222898 A222899 * A222901 A222902 A222903 KEYWORD nonn AUTHOR R. H. Hardin Mar 09 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 January 22 04:27 EST 2020. Contains 331133 sequences. (Running on oeis4.)