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A201159 Irregular triangle read by rows: number of shifted Schroeder paths of length n and area k. 1
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, 13, 9, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..34.

Brian Drake, Limits of areas under lattice paths, Discrete Math. 309 (2009), no. 12, 3936-3953. See Example 4.

EXAMPLE

Triangle begins

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 13 9 4 1

...

CROSSREFS

Row sums are A064641.

Sequence in context: A303940 A280134 A143488 * A047070 A071127 A029381

Adjacent sequences:  A201156 A201157 A201158 * A201160 A201161 A201162

KEYWORD

nonn,tabf,more

AUTHOR

N. J. A. Sloane, Nov 27 2011

STATUS

approved

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Last modified June 16 20:32 EDT 2021. Contains 345069 sequences. (Running on oeis4.)