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A242542 Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..n introduced in 0..n order 1
6, 32, 150, 690, 3311, 16968, 93103, 544920, 3386262, 22243902, 153850981, 1116625523, 8478969009, 67185160511, 554235206898, 4750165417926, 42219358673456, 388485398829204, 3695187060252009, 36282147267628868 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A242549

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..132

EXAMPLE

Some solutions for n=4

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

..1....0....1....0....1....1....1....1....1....1....1....1....1....1....1....1

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

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

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

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

..3....2....0....2....0....3....4....3....3....2....2....2....1....0....2....3

CROSSREFS

Sequence in context: A245128 A121333 A243026 * A046725 A232331 A231992

Adjacent sequences:  A242539 A242540 A242541 * A242543 A242544 A242545

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 17 2014

STATUS

approved

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Last modified December 7 20:39 EST 2021. Contains 349589 sequences. (Running on oeis4.)