The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A223369 6X6X6 triangular graph coloring a rectangular array: number of nX7 0..20 arrays where 0..20 label nodes of the fully triangulated graph and every array movement to a horizontal or vertical neighbor moves along an edge of this graph 1
 221760, 250834914, 365447949798, 573055927043172, 928457167048336590, 1524391185435213940170, 2520297393549555690831036, 4179551352031701135658304214, 6944490071035753511344864688838 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A223370 LINKS R. H. Hardin, Table of n, a(n) for n = 1..71 EXAMPLE Some solutions for n=3 ..0..1..0..1..3..6..3....0..1..0..2..5..2..0....0..1..0..2..5..2..5 ..1..0..2..0..1..3..1....1..0..2..4..2..4..1....1..0..2..0..2..0..2 ..0..2..0..1..4..7..4....0..2..0..2..5..8..4....0..2..0..1..0..2..4 Vertex neighbors: 0 -> 1 2 1 -> 0 2 3 4 2 -> 0 1 4 5 3 -> 1 4 6 7 4 -> 1 2 3 5 7 8 5 -> 2 4 8 9 6 -> 3 7 10 11 7 -> 3 4 6 8 11 12 8 -> 4 5 7 9 12 13 9 -> 5 8 13 14 10 -> 6 11 15 16 11 -> 6 7 10 12 16 17 12 -> 7 8 11 13 17 18 13 -> 8 9 12 14 18 19 14 -> 9 13 19 20 15 -> 10 16 16 -> 10 11 15 17 17 -> 11 12 16 18 18 -> 12 13 17 19 19 -> 13 14 18 20 20 -> 14 19 CROSSREFS Sequence in context: A294014 A234489 A321160 * A254509 A254516 A254816 Adjacent sequences: A223366 A223367 A223368 * A223370 A223371 A223372 KEYWORD nonn AUTHOR R. H. Hardin Mar 19 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 29 00:59 EDT 2023. Contains 363029 sequences. (Running on oeis4.)