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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A302272 Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
0, 3, 22, 89, 1219, 15862, 384916, 11370253, 325745362, 20953111994 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302278.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5:

  0 0 1 0 0     0 1 1 0 1     0 1 1 0 0     0 1 1 0 0

  1 0 0 1 1     1 0 0 1 1     1 0 0 1 1     0 0 1 1 1

  0 1 0 0 0     0 1 0 1 1     0 0 0 0 0     0 1 0 1 1

  1 1 0 1 1     0 1 0 0 0     1 1 0 0 1     0 1 1 0 0

  1 0 0 1 1     1 0 1 1 0     0 0 1 1 0     1 0 0 1 0

CROSSREFS

Cf. A302278.

Sequence in context: A004305 A275290 A277228 * A302723 A095663 A254332

Adjacent sequences:  A302269 A302270 A302271 * A302273 A302274 A302275

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 04 2018

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 6 15:41 EDT 2020. Contains 333276 sequences. (Running on oeis4.)