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!)
A211901 Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-4 0
0, 0, 15, 1198, 36845, 481826, 3783481, 21275955, 94456783, 351372295, 1138865701, 3304768611, 8756290720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A211904

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

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

....1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2

...3.4.5....2.3.0....3.4.5....3.4.5....3.4.5....3.4.1....3.4.0....3.4.1

..5.6.0.3..4.0.5.6..0.2.6.0..6.2.7.2..6.1.3.1..0.1.5.6..1.5.3.6..5.2.5.6

CROSSREFS

Sequence in context: A027492 A001728 A326219 * A059383 A206394 A098723

Adjacent sequences:  A211898 A211899 A211900 * A211902 A211903 A211904

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 25 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 30 12:10 EDT 2020. Contains 333125 sequences. (Running on oeis4.)