The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons 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 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208413 Number of 6Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1
 187, 700075, 2646531062, 10084768380770, 38410047476679936, 146298576850884166522, 557229580446475130201608, 2122405243795588131572978866, 8083928267793741312454314127058 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 6 of A208408 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0 ..1..0..1..0....0..1..0..1....1..1..2..1....1..2..2..0....1..1..2..0 ..2..3..1..3....2..1..3..2....1..2..1..3....1..3..1..3....2..2..1..0 ..2..2..1..1....1..3..0..3....2..3..1..0....1..0..3..3....3..2..2..0 ..3..2..0..1....1..0..2..1....0..1..1..1....3..2..1..3....2..3..3..0 ..0..3..3..1....0..3..3..3....1..2..2..3....2..2..2..2....1..2..3..2 CROSSREFS Sequence in context: A241118 A208199 A208406 * A198905 A198252 A070257 Adjacent sequences:  A208410 A208411 A208412 * A208414 A208415 A208416 KEYWORD nonn AUTHOR R. H. Hardin Feb 26 2012 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 December 6 06:14 EST 2021. Contains 349563 sequences. (Running on oeis4.)