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!)
A297430 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 neighboring 1s. 1
1, 73, 301, 1057, 12005, 76692, 431723, 3338387, 23694911, 160290601, 1169727060, 8508584171, 61149185363, 447149103717, 3281694474016, 24037530274436, 176807186467726, 1303136084563758, 9604835986239513, 70874413268008409 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A297431.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 81

FORMULA

Empirical recurrence of order 81 (see link above)

EXAMPLE

Some solutions for n=5

..0..0..1..1..0..1..1. .0..0..0..1..1..0..0. .0..0..1..0..0..0..0

..0..1..1..0..0..1..1. .0..0..1..0..0..1..0. .0..1..1..1..0..1..1

..0..0..0..0..0..0..0. .1..1..0..0..0..1..1. .0..0..0..0..0..1..1

..0..1..0..0..0..1..1. .0..1..0..0..1..0..0. .0..1..1..1..0..0..0

..1..1..1..0..0..1..1. .0..0..1..1..0..0..0. .0..0..1..0..0..0..0

CROSSREFS

Cf. A297431.

Sequence in context: A174334 A142614 A158744 * A142406 A005108 A142810

Adjacent sequences:  A297427 A297428 A297429 * A297431 A297432 A297433

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 14 05:00 EDT 2021. Contains 342941 sequences. (Running on oeis4.)