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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A269763 Number of nX4 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once. 1
450, 524160, 326697720, 170119348800, 81208264293720, 36821411380183680, 16136599337765506680, 6902518041829140001920, 2899610192068539725611800, 1201070898923243105905234560, 491952252969600904794435746040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A269767.

LINKS

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

FORMULA

Empirical: a(n) = 798*a(n-1) -180699*a(n-2) +8707236*a(n-3) -167225067*a(n-4) +1392360966*a(n-5) -4194764289*a(n-6) for n>7

EXAMPLE

Some solutions for n=1

..5..0..1..0. .5..0..0..3. .2..2..3..3. .5..0..0..0. .0..4..4..1

CROSSREFS

Cf. A269767.

Sequence in context: A263820 A269884 A145492 * A020268 A066322 A128922

Adjacent sequences:  A269760 A269761 A269762 * A269764 A269765 A269766

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2016

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 January 19 09:12 EST 2021. Contains 340267 sequences. (Running on oeis4.)