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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233127 Number of nX6 0..5 arrays with no element x(i,j) adjacent to itself or value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order (unlabelled 6-colorings with no clashing color pairs) 1
 136, 124928, 127533056, 132682612736, 138791062863872, 145451790488305664, 152534173898504142848, 160000135886807521820672, 167846256915736431983329280, 176082743571854371127073701888 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A233129 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 1984*a(n-1) -1314816*a(n-2) +411303936*a(n-3) -70111985664*a(n-4) +6893422510080*a(n-5) -389708152569856*a(n-6) +11733988091625472*a(n-7) -145241087982698496*a(n-8) EXAMPLE Some solutions for n=2 ..0..1..2..4..2..0....0..1..2..5..1..5....0..1..0..1..5..2....0..1..0..4..2..1 ..1..5..4..2..0..4....4..2..4..3..5..2....3..5..4..0..4..5....1..5..4..2..4..2 CROSSREFS Sequence in context: A278185 A225832 A233172 * A157880 A233254 A001330 Adjacent sequences:  A233124 A233125 A233126 * A233128 A233129 A233130 KEYWORD nonn AUTHOR R. H. Hardin, Dec 04 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 21 19:59 EDT 2021. Contains 345365 sequences. (Running on oeis4.)