The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A184057 Number of strings of n+2 numbers x(i) in -5..5 with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other 0

%I #4 Mar 31 2012 12:35:56

%S 1,25,143,839,10135,106047,1015445,9974135,100003019,1002241579,

%T 9943531087

%N Number of strings of n+2 numbers x(i) in -5..5 with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other

%C Column 5 of A184061

%e Some solutions for n=4

%e ..5...-2...-1...-1....5....5...-4....1....4....5...-1....0...-1...-2....0....1

%e .-2....3....0....3...-4...-4....3....0....3....4...-2...-5...-2....3....5....5

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

%e ..4...-1...-1...-2....3...-3...-5....1....1....3...-2...-5....1....1...-5...-2

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 09 2011

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 May 29 08:22 EDT 2024. Contains 372926 sequences. (Running on oeis4.)