login
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
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
CROSSREFS
Sequence in context: A116149 A184709 A190943 * A234280 A298013 A302614
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 23 2010
STATUS
approved