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 A269493 Number of length-n 0..7 arrays with no repeated value differing from the previous repeated value by one. 1

%I

%S 8,64,512,4082,32460,257536,2039274,16120298,127240496,1003029086,

%T 7897819380,62124999480,488250966838,3834268407348,30090123746866,

%U 235994522394958,1849892639767268,14493867039521420,113511139403772878

%N Number of length-n 0..7 arrays with no repeated value differing from the previous repeated value by one.

%C Column 7 of A269494.

%H R. H. Hardin, <a href="/A269493/b269493.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 35*a(n-1) -483*a(n-2) +3234*a(n-3) -9950*a(n-4) +7266*a(n-5) +16356*a(n-6) +1169*a(n-7) -487*a(n-8) -21*a(n-9)

%e Some solutions for n=5

%e ..6. .4. .3. .5. .4. .3. .5. .1. .0. .4. .3. .3. .0. .1. .0. .3

%e ..1. .5. .3. .5. .6. .7. .0. .3. .2. .0. .2. .1. .1. .2. .0. .6

%e ..1. .5. .2. .2. .4. .7. .2. .2. .2. .6. .5. .3. .7. .1. .0. .6

%e ..4. .6. .1. .4. .4. .1. .0. .3. .5. .0. .6. .6. .1. .4. .2. .0

%e ..6. .7. .2. .6. .7. .3. .2. .2. .2. .0. .0. .3. .2. .0. .1. .4

%Y Cf. A269494.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 28 2016

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Last modified December 9 05:30 EST 2021. Contains 349627 sequences. (Running on oeis4.)