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!)
A047040 Array T read by diagonals: T(h,k)=number of paths consisting of steps from (0,0) to (h,k) such that each step has length 1 directed up or right and no step touches the line y=3x/4 unless x=0 or x=h. 10

%I #5 Mar 30 2012 18:56:51

%S 1,1,1,1,1,1,1,2,1,1,1,3,2,2,1,1,4,5,2,3,1,1,5,9,5,5,4,1,1,6,14,14,10,

%T 9,5,1,1,7,20,28,14,9,14,6,1,1,8,27,48,42,14,23,20,7,1,1,9,35,75,90,

%U 56,23,43,27,8,1,1,10,44,110,165,146,56,66,70,35

%N Array T read by diagonals: T(h,k)=number of paths consisting of steps from (0,0) to (h,k) such that each step has length 1 directed up or right and no step touches the line y=3x/4 unless x=0 or x=h.

%e Diagonal (beginning on row 0): {1}; {1,1}; {1,1,1}; {1,2,1,1}; ...

%Y Mirror image of A047050.

%K nonn,tabl

%O 0,8

%A _Clark Kimberling_

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 June 9 03:53 EDT 2024. Contains 373227 sequences. (Running on oeis4.)