A180905 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

1, 10, 145, 2305, 38425, 658150, 11475967, 202638268, 3611795992, 64844177233, 1170911158391, 21243152740392, 386910521871007, 7070237389426634, 129563341767875760, 2380069961493574246, 43815001110882309299

Offset

1,2

Comments

Paths down a n-high rectangular-grid right triangle with interior neighbor fanout 2*9+1

Column 9 of A180906

Links

R. H. Hardin, Table of n, a(n) for n=1..100

Crossrefs

Sequence in context: A180914 A268737 A292844 * A062744 A059968 A255522

Adjacent sequences: A180902 A180903 A180904 * A180906 A180907 A180908

Keyword

nonn

Author

R. H. Hardin Sep 23 2010

Status

approved