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A190795
Number of two-sided n-step prudent walks ending on the top side or the right side of their boxes, avoiding two consecutive west steps and south steps.
0
1, 4, 8, 22, 52, 130, 316, 774, 1884, 4588, 11152, 27088, 65730, 159388, 386248, 935496, 2264662, 5479952
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..18.
S. Gao and H. Niederhausen,
Sequences Arising From Prudent Self-Avoiding Walks
, 2010.
CROSSREFS
Sequence in context:
A322284
A175655
A000639
*
A052528
A058855
A297339
Adjacent sequences:
A190792
A190793
A190794
*
A190796
A190797
A190798
KEYWORD
nonn
,
walk
,
more
AUTHOR
Shanzhen Gao
, May 20 2011
STATUS
approved
