login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A208257 Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors 1

%I

%S 365,393216,415737216,439026252912,463586569433280,489518751475118880,

%T 516901401841519506624,545815772261840889783840,

%U 576347550907375513255891248,608587212579607572737693478288

%N Number of nX7 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors

%C Column 7 of A208258

%H R. H. Hardin, <a href="/A208257/b208257.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 1373*a(n-1) -382385*a(n-2) +54747930*a(n-3) -5050986386*a(n-4) +332267679041*a(n-5) -16472142082703*a(n-6) +636007583672478*a(n-7) -19508251954601454*a(n-8) +480569383283952657*a(n-9) -9546208348531626993*a(n-10) +152598952268814061851*a(n-11) -1946846244225175080346*a(n-12) +19518911243309328077698*a(n-13) -150002896733353526035184*a(n-14) +849776274453519925228352*a(n-15) -3327166677806732426576264*a(n-16) +7899544532604413646690344*a(n-17) -6508673827964553701633600*a(n-18) -20940104457639861466791296*a(n-19) +72463799516214011378881024*a(n-20) -61429017906552923870936064*a(n-21) -129536619155578798140518400*a(n-22) +380737956559758296779800576*a(n-23) -211491273596407625450717184*a(n-24) -649598231455057371522924544*a(n-25) +1411628961483792374550233088*a(n-26) -535856510128456063711707136*a(n-27) -2479363142583076923579039744*a(n-28) +5970652384046936507902066688*a(n-29) -7499573050858256420655071232*a(n-30) +6280307951272279750928760832*a(n-31) -3675985493399257320121171968*a(n-32) +1481320042982141475269115904*a(n-33) -383743024338594997911683072*a(n-34) +54171200367877184095780864*a(n-35) -2546711369956156422225920*a(n-36) for n>37

%e Some solutions for n=4

%e ..0..1..2..1..1..1..0....0..1..0..2..1..2..2....0..0..0..0..1..1..1

%e ..1..2..0..1..2..2..1....1..2..0..1..2..0..0....2..0..1..2..0..2..1

%e ..0..0..1..2..1..0..2....2..0..1..2..0..1..0....1..1..2..0..1..0..0

%e ..1..2..2..0..0..2..1....1..2..0..1..2..2..0....0..2..1..2..1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 24 2012

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 1 16:10 EDT 2022. Contains 354973 sequences. (Running on oeis4.)