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!)
 A280483 Number of 4Xn 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1
 0, 158, 1939, 15104, 100306, 618883, 3589912, 20094736, 109292013, 581664562, 3041562335, 15676720945, 79831562595, 402387057319, 2010428875456, 9967869656098, 49089654019152, 240315798975781, 1170192251577228 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 4 of A280480. LINKS R. H. Hardin, Table of n, a(n) for n = 1..131 EXAMPLE Some solutions for n=4 ..0..0..1..1. .0..0..0..1. .0..0..0..1. .0..0..1..0. .0..0..0..0 ..0..1..2..2. .1..0..1..1. .0..0..1..1. .0..1..2..2. .1..1..1..1 ..2..2..0..2. .0..1..2..2. .0..2..1..1. .1..2..2..0. .0..1..1..1 ..0..0..2..2. .1..2..2..1. .2..0..1..1. .2..2..0..0. .1..1..1..2 CROSSREFS Cf. A280480. Sequence in context: A270791 A180096 A250996 * A252359 A159418 A159434 Adjacent sequences:  A280480 A280481 A280482 * A280484 A280485 A280486 KEYWORD nonn AUTHOR R. H. Hardin, Jan 04 2017 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 April 11 16:42 EDT 2021. Contains 342888 sequences. (Running on oeis4.)