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A201080 Irregular triangle read by rows: number of shifted Schroeder paths of length n and area k. 1
1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 3, 4, 3, 3, 3, 1, 1, 1, 1, 3, 3, 5, 6, 8, 9, 11, 12, 11, 10, 7, 6, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

REFERENCES

Drake, Brian, Limits of areas under lattice paths. Discrete Math. 309 (2009), no. 12, 3936-3953. See Example 3.

LINKS

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

EXAMPLE

Triangle begins

1

1 1

1 1 1 2 1

1 1 1 3 3 4 3 3 3 1

1 1 1 3 3 5 6 8 9 11 12 11 10 7 6 4 1

...

CROSSREFS

Row sums give A133656.

Sequence in context: A258445 A129179 A120621 * A039754 A213919 A062277

Adjacent sequences:  A201077 A201078 A201079 * A201081 A201082 A201083

KEYWORD

nonn,tabf,more

AUTHOR

N. J. A. Sloane, Nov 26 2011

STATUS

approved

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Last modified April 25 19:05 EDT 2017. Contains 285426 sequences.