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!)
A128937 Triangle formed by reading A039598 mod 2. 3

%I #11 Apr 21 2021 10:44:27

%S 1,0,1,1,0,1,0,0,0,1,0,0,1,0,1,0,1,0,0,0,1,1,0,1,0,1,0,1,0,0,0,0,0,0,

%T 0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,1,0,1,0,1,0,0,

%U 0,1,0,0,0,0,0,0,0,1,0,0,1,0,1,0,0,0,0,0,1,0,1,0,1,0,0,0,1,0,0,0,1,0,0,0,1

%N Triangle formed by reading A039598 mod 2.

%C Also triangle formed by reading triangles A052179, A053121, A124575, A126075, A126093.

%C Also triangle formed by reading A065600 mod 2. - _Philippe Deléham_, Oct 15 2007

%F Sum_{k=0..n} T(n,k) = A048896(n).

%F Sum_{k=0..n} T(n,k)*2^(n-k) = A101692(n). - _Philippe Deléham_, Oct 09 2007

%F Sum_{k=0..n} T(n,k)*2^k = A062878(n+1)/3. - _Philippe Deléham_, Aug 31 2009

%e Triangle begins:

%e 1;

%e 0, 1;

%e 1, 0, 1;

%e 0, 0, 0, 1;

%e 0, 0, 1, 0, 1;

%e 0, 1, 0, 0, 0, 1;

%e 1, 0, 1, 0, 1, 0, 1;

%e 0, 0, 0, 0, 0, 0, 0, 1;

%e 0, 0, 0, 0, 0, 0, 1, 0, 1;

%e 0, 0, 0, 0, 0, 1, 0, 0, 0, 1;

%e 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1;

%e 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1;

%e 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1;

%e 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1;

%e 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1;

%e 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1; ...

%p A039598 := proc(n,k)

%p binomial(2*n,n-k)-binomial(2*n,n-k-2) ;

%p end proc:

%p A128937 := proc(n,k)

%p modp(A039598(n,k),2) ;

%p end proc: # _R. J. Mathar_, Apr 21 2021

%Y Cf. A048896 (row sums).

%K nonn,tabl,easy

%O 0,1

%A _Philippe Deléham_, Apr 27 2007, May 02 2007

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 April 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)