login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A241970 Number of length 7+3 0..n arrays with no consecutive four elements summing to more than 2*n 1
285, 11518, 172980, 1460409, 8476317, 37822419, 138925925, 439298830, 1233421948, 3144133223, 7397932763, 16271365032, 33784971650, 66744596242, 126257435694, 229882539967, 404612835239, 690928552540, 1148210556166 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A241964

LINKS

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

FORMULA

Empirical: a(n) = (1057/10368)*n^10 + (16313/13440)*n^9 + (787993/120960)*n^8 + (139919/6720)*n^7 + (760961/17280)*n^6 + (124127/1920)*n^5 + (3473863/51840)*n^4 + (20441/420)*n^3 + (240259/10080)*n^2 + (2001/280)*n + 1

EXAMPLE

Some solutions for n=3

..2....2....2....0....0....2....0....0....2....2....2....0....0....0....0....0

..1....0....3....0....3....1....2....2....0....2....1....0....3....1....0....1

..1....3....0....1....0....1....1....0....1....0....0....0....0....2....0....3

..1....0....0....0....0....1....0....1....3....0....3....2....1....0....2....1

..3....1....1....1....2....2....1....0....1....1....1....0....2....1....3....0

..1....0....0....0....0....2....3....2....0....1....0....2....1....1....0....0

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

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

..1....1....2....0....2....3....0....0....1....3....3....1....1....2....3....0

..1....1....0....0....1....0....1....2....1....0....0....1....3....3....1....0

CROSSREFS

Sequence in context: A176712 A225881 A278629 * A231422 A146893 A090089

Adjacent sequences:  A241967 A241968 A241969 * A241971 A241972 A241973

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 03 2014

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 September 15 14:32 EDT 2019. Contains 327078 sequences. (Running on oeis4.)