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A180905
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Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=9*i and |p(i)-p(i-1)|<=9
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1
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1, 10, 145, 2305, 38425, 658150, 11475967, 202638268, 3611795992, 64844177233, 1170911158391, 21243152740392, 386910521871007, 7070237389426634, 129563341767875760, 2380069961493574246, 43815001110882309299
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OFFSET
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1,2
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COMMENTS
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Paths down a n-high rectangular-grid right triangle with interior neighbor fanout 2*9+1
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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