A180902 Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=6*i and |p(i)-p(i-1)|<=6

1, 7, 70, 763, 8715, 102221, 1220268, 14749175, 179930563, 2210840169, 27320772214, 339198895902, 4227660547195, 52864983381874, 662907897706177, 8332812488242325, 104966459288054037, 1324710070914750097

Offset

1,2

Comments

Paths down a n-high rectangular-grid right triangle with interior neighbor fanout 2*6+1

Column 6 of A180906

Links

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

Crossrefs

Sequence in context: A249750 A144848 A292841 * A078246 A268301 A228927

Adjacent sequences: A180899 A180900 A180901 * A180903 A180904 A180905

Keyword

nonn

Author

R. H. Hardin Sep 23 2010

Status

approved