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A178037 Number of two-sided n-step prudent walks ending on the top side or right side of their box, avoiding more than two consecutive west steps and more than two consecutive south steps. 0
1, 4, 10, 26, 64, 162, 406, 1018, 2546, 6362, 15878, 39592, 98638, 245562, 610936, 1519090, 3775302, 9378288 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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=0..17.

CROSSREFS

Sequence in context: A308723 A133086 A285186 * A175658 A191605 A277236

Adjacent sequences:  A178034 A178035 A178036 * A178038 A178039 A178040

KEYWORD

nonn,walk

AUTHOR

Shanzhen Gao, May 17 2010

STATUS

approved

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Last modified November 17 10:59 EST 2019. Contains 329225 sequences. (Running on oeis4.)