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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A268055 Number of nX7 0..2 arrays with new values introduced in each row and column in sequential order starting with zero. 1
1, 64, 10438, 2796826, 915745002, 322124540754, 116124404018058, 42209510913723266, 15385058360607977882, 5612935794998414602514, 2048403161005485984441578, 747628311641175955079078306 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A268056.

LINKS

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

FORMULA

Empirical: a(n) = 549*a(n-1) -75693*a(n-2) +3237331*a(n-3) -45379926*a(n-4) +206208420*a(n-5) -255602200*a(n-6)

EXAMPLE

Some solutions for n=3

..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

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

..0..1..0..2..0..0..2....0..1..0..2..1..0..2....0..1..2..1..1..1..0

CROSSREFS

Cf. A268056.

Sequence in context: A239403 A254607 A236690 * A268078 A202548 A209779

Adjacent sequences:  A268052 A268053 A268054 * A268056 A268057 A268058

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 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 December 2 03:43 EST 2021. Contains 349437 sequences. (Running on oeis4.)