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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A218066 Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..1 3Xn array 1
8, 16, 74, 260, 1046, 3974, 15578, 60242, 234468, 910060, 3536762, 13737348, 53371468, 207332364, 805465810, 3129084596, 12156035112, 47224200410, 183458638422, 712707497212, 2768755861210, 10756176540402, 41786039888224 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A218064

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..170

FORMULA

Empirical: a(n) = 2*a(n-1) +11*a(n-2) -7*a(n-3) -34*a(n-4) +11*a(n-5) +49*a(n-6) -14*a(n-7) -36*a(n-8) +7*a(n-9) +a(n-10) +8*a(n-11) +2*a(n-12) -13*a(n-13) +2*a(n-14) +4*a(n-15) for n>18

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A218899 A282785 A278747 * A157164 A131539 A331419

Adjacent sequences:  A218063 A218064 A218065 * A218067 A218068 A218069

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 19 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 22 16:57 EDT 2022. Contains 353957 sequences. (Running on oeis4.)