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!)
A224740 Number of (n+1)X4 0..1 matrices with each 2X2 permanent equal 1
89, 565, 2961, 18257, 107665, 661569, 4028161, 24772161, 152077313, 935846145, 5757221121, 35438268417, 218128814081, 1342810858497, 8266377695233, 50889801535489, 313290148417537, 1928708042670081, 11873713471619073 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A224745

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-1) -8*a(n-2) -88*a(n-3) +176*a(n-4) +88*a(n-5) -352*a(n-6) +80*a(n-7) +160*a(n-8) -64*a(n-9)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A159747 A141866 A176634 * A028472 A136646 A142566

Adjacent sequences:  A224737 A224738 A224739 * A224741 A224742 A224743

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 17 2013

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 May 14 19:53 EDT 2021. Contains 343903 sequences. (Running on oeis4.)