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A190735 Number of two-sided n-step prudent walks ending on the top side of their boxes, avoiding exactly two consecutive west steps and south steps. 0
1, 3, 6, 16, 38, 93, 93, 223, 540, 1305, 3157, 7629, 18436, 44543, 107607, 259899, 627606, 1515284, 3657904, 8828836 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

S. Gao, H. Niederhausen, Sequences Arising From Prudent Self-Avoiding Walks (submitted to INTEGERS: The Electronic Journal of Combinatorial Number Theory).

LINKS

Table of n, a(n) for n=1..20.

CROSSREFS

Sequence in context: A203068 A321229 A114410 * A096588 A256943 A275207

Adjacent sequences:  A190732 A190733 A190734 * A190736 A190737 A190738

KEYWORD

nonn,walk

AUTHOR

Shanzhen Gao, May 18 2011

STATUS

approved

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Last modified November 17 08:36 EST 2019. Contains 329217 sequences. (Running on oeis4.)