A180912 Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=7*i and -7<p(i)-p(i-1)<=7

1, 8, 91, 1112, 14168, 184564, 2439577, 32572164, 438101477, 5925607074, 80499964475, 1097457242138, 15004835665400, 205644110230912, 2824097290775308, 38850138735886138, 535243777169316325

Offset

1,2

Comments

Paths down a n-high staggered-grid minimally right-leaning right triangle with interior neighbor fanout 2*7

Column 7 of A180915

Links

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

Crossrefs

Sequence in context: A116149 A184709 A190943 * A234280 A298013 A302614

Adjacent sequences: A180909 A180910 A180911 * A180913 A180914 A180915

Keyword

nonn

Author

R. H. Hardin Sep 23 2010

Status

approved