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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A297308 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's. 1
 1, 7, 117, 3808, 484808, 200646607, 197589351469, 578079526400673, 5377924483062338484, 139752957415982420114129, 10302206214700301342887034910, 2267938084956284272782357464419480 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A297314. LINKS R. H. Hardin, Table of n, a(n) for n = 1..17 EXAMPLE Some solutions for n=5 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..1..0..1..1 ..0..1..1..0..0. .1..1..0..0..0. .0..0..0..0..0. .1..1..0..1..1 ..0..0..0..1..0. .0..1..0..0..0. .1..1..0..0..0. .1..1..0..0..0 ..0..0..1..0..0. .1..0..0..1..1. .0..1..1..0..0. .1..1..0..0..0 ..0..0..0..1..1. .0..0..0..0..0. .0..1..1..0..0. .1..0..0..1..1 CROSSREFS Cf. A297314. Sequence in context: A096760 A178791 A299429 * A077394 A009696 A218049 Adjacent sequences:  A297305 A297306 A297307 * A297309 A297310 A297311 KEYWORD nonn AUTHOR R. H. Hardin, Dec 28 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 January 29 00:42 EST 2022. Contains 350670 sequences. (Running on oeis4.)