A269407 Number of length-n 0..6 arrays with no repeated value greater than or equal to the previous repeated value.

7, 49, 336, 2289, 15477, 104006, 695135, 4623815, 30625210, 202067047, 1328649469, 8708852838, 56920021347, 371043659463, 2412849114074, 15655214564192, 101363364976160, 655024985471255, 4225174990367555, 27207648363845138

Offset

1,1

Comments

Column 6 of A269409.

Links

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

Formula

Empirical: a(n) = 42*a(n-1) -735*a(n-2) +6748*a(n-3) -32319*a(n-4) +53130*a(n-5) +172655*a(n-6) -705840*a(n-7) -418320*a(n-8) +3386880*a(n-9) +2522016*a(n-10) -7402752*a(n-11) -13063680*a(n-12) -7838208*a(n-13) -1679616*a(n-14)

Example

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

Crossrefs

Cf. A269409.

Sequence in context: A269638 A269535 A269676 * A269604 A269465 A268455

Adjacent sequences: A269404 A269405 A269406 * A269408 A269409 A269410

Keyword

nonn

Author

R. H. Hardin, Feb 25 2016

Status

approved