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!)
A188235 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal 1
1, 9, 49, 311, 1852, 10994, 64370, 374820, 2171675, 12546170, 72337436, 416605786, 2397909069, 13799639040, 79425097850, 457295766838, 2634229243277, 15183632033377, 87578564420013, 505526226244917, 2920309324204918 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 8 of A188236

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..25

EXAMPLE

Some solutions for n=4

-10...-7...-7...-8...-4...-9...-6...-4...-5...-9...-7...-6...-8...-4...-6...-7

.-7...-5...-6...-5...-1...-3...-6...-2...-3...-3...-5...-6....0...-3...-2....2

..7....4....4....3....1....3....3....0....1....6....2....2....0...-2...-1....2

.10....8....9...10....4....9....9....6....7....6...10...10....8....9....9....3

CROSSREFS

Sequence in context: A090390 A199411 A069665 * A286810 A066558 A168597

Adjacent sequences:  A188232 A188233 A188234 * A188236 A188237 A188238

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 24 2011

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 February 27 03:50 EST 2020. Contains 332299 sequences. (Running on oeis4.)