login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A201159 Irregular triangle read by rows: number of shifted Schroeder paths of length n and area k. 1

%I

%S 1,1,1,1,1,2,2,1,1,1,2,2,4,5,5,5,3,1,1,1,2,2,4,5,8,10,12,13,15,17,16,

%T 13,9,4,1

%N Irregular triangle read by rows: number of shifted Schroeder paths of length n and area k.

%H Brian Drake, <a href="http://dx.doi.org/10.1016/j.disc.2008.11.020">Limits of areas under lattice paths</a>, Discrete Math. 309 (2009), no. 12, 3936-3953. See Example 4.

%e Triangle begins

%e 1

%e 1 1

%e 1 1 2 2 1

%e 1 1 2 2 4 5 5 5 3 1

%e 1 1 2 2 4 5 8 10 12 13 15 17 16 13 9 4 1

%e ...

%Y Row sums are A064641.

%K nonn,tabf,more

%O 0,6

%A _N. J. A. Sloane_, Nov 27 2011

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 3 07:58 EDT 2021. Contains 346435 sequences. (Running on oeis4.)