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!)
 A184651 Number of (n+2)X4 0..3 arrays with each 3X3 subblock nonsingular 1
 11826498, 2393686398, 484872198498, 98159708768710, 19873044281563890, 4023477498134224486, 814585573094687997378, 164919489595820615871894, 33389299480927975477593698, 6759936480082800776073384278 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A184652 LINKS R. H. Hardin, Table of n, a(n) for n = 1..31 EXAMPLE Some solutions for 6X4 ..0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..0 ..1..0..0..2....1..0..0..2....1..0..0..2....1..0..0..2....1..0..0..2 ..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0 ..1..0..1..0....0..0..1..0....1..0..1..0....0..0..1..0....3..0..1..0 ..2..0..1..1....1..3..1..2....0..2..2..3....1..3..1..1....2..0..2..2 ..1..1..2..1....2..0..3..3....1..1..0..0....1..1..3..3....0..3..3..3 CROSSREFS Sequence in context: A228978 A234831 A280983 * A123086 A208490 A272021 Adjacent sequences:  A184648 A184649 A184650 * A184652 A184653 A184654 KEYWORD nonn AUTHOR R. H. Hardin Jan 19 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 5 23:38 EST 2021. Contains 349558 sequences. (Running on oeis4.)