A269582 Number of length-n 0..7 arrays with no repeated value differing from the previous repeated value by more than one.

8, 64, 512, 4054, 31844, 248464, 1927694, 14883506, 114432704, 876609410, 6693701964, 50967425636, 387098903346, 2933396893868, 22183992767622, 167461699511636, 1262042210932508, 9496886175805244, 71366766025036418

Offset

1,1

Comments

Column 7 of A269583.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 35*a(n-1) -485*a(n-2) +3290*a(n-3) -10541*a(n-4) +10073*a(n-5) +11122*a(n-6) +2072*a(n-7) -47*a(n-8) -14*a(n-9)

Example

Some solutions for n=5
..5. .6. .3. .2. .1. .7. .7. .4. .3. .7. .6. .5. .4. .1. .3. .0
..7. .0. .1. .1. .7. .4. .7. .0. .6. .7. .2. .6. .7. .2. .6. .4
..2. .6. .1. .2. .0. .1. .3. .1. .5. .4. .0. .0. .2. .3. .0. .1
..7. .0. .7. .0. .4. .3. .7. .6. .6. .0. .7. .7. .1. .0. .0. .7
..2. .5. .0. .3. .3. .1. .0. .3. .4. .6. .3. .2. .1. .2. .6. .2

Crossrefs

Cf. A269583.

Sequence in context: A222388 A222937 A269618 * A269434 A269689 A269493

Adjacent sequences: A269579 A269580 A269581 * A269583 A269584 A269585

Keyword

nonn

Author

R. H. Hardin, Mar 01 2016

Status

approved