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A269638 Number of length-n 0..6 arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1. 1
7, 49, 336, 2279, 15307, 101999, 675151, 4443665, 29104549, 189818232, 1233390075, 7987992466, 51583193592, 332235953819, 2134851774996, 13688959603199, 87607353750867, 559696980939927, 3570042462583517, 22738396298175560 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A269640.
LINKS
FORMULA
Empirical: a(n) = 42*a(n-1) -735*a(n-2) +6748*a(n-3) -32319*a(n-4) +53130*a(n-5) +172660*a(n-6) -705975*a(n-7) -416955*a(n-8) +3381035*a(n-9) +2527266*a(n-10) -7375032*a(n-11) -13093923*a(n-12) -7922412*a(n-13) -1718604*a(n-14)
EXAMPLE
Some solutions for n=6
..0. .2. .6. .5. .2. .6. .6. .3. .1. .3. .4. .6. .2. .2. .0. .4
..3. .5. .0. .4. .0. .0. .0. .6. .3. .5. .0. .0. .5. .4. .6. .6
..5. .1. .6. .6. .1. .2. .6. .0. .4. .1. .1. .5. .3. .6. .5. .5
..2. .0. .2. .0. .2. .1. .3. .2. .3. .0. .3. .4. .6. .6. .3. .1
..3. .2. .2. .1. .2. .4. .3. .3. .6. .5. .1. .1. .5. .5. .5. .4
..1. .3. .4. .1. .1. .4. .6. .6. .6. .6. .0. .4. .5. .2. .3. .1
CROSSREFS
Cf. A269640.
Sequence in context: A267469 A126639 A268942 * A269535 A269676 A269407
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 02 2016
STATUS
approved

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Last modified June 14 15:00 EDT 2024. Contains 373400 sequences. (Running on oeis4.)