login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Number of size n nonnegative integer arrays with new values introduced in increasing order from 0, and no 7 consecutive elements totalling n or more
1

%I #5 Mar 31 2012 12:36:21

%S 1,2,4,11,30,87,273,884,3528,15794,77546,411280,2330917,13986818,

%T 88229024,584296099,4065067511,29670613826,226603232720,1805007845631,

%U 14960664057034,128832477724303,1150304120201088,10631476589401031

%N Number of size n nonnegative integer arrays with new values introduced in increasing order from 0, and no 7 consecutive elements totalling n or more

%H R. H. Hardin, <a href="/A193062/b193062.txt">Table of n, a(n) for n = 1..28</a>

%e Some solutions for n=8

%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

%e ..1....0....1....1....1....0....1....0....1....1....1....0....0....1....0....1

%e ..1....1....2....2....0....0....0....1....2....2....0....1....1....0....1....0

%e ..1....2....1....0....2....0....0....1....1....0....1....0....0....2....2....2

%e ..1....1....0....1....1....1....2....1....1....0....0....0....1....1....0....3

%e ..1....2....0....0....3....2....0....0....0....0....0....2....1....1....0....0

%e ..0....1....3....1....0....1....1....0....0....0....0....0....1....0....0....0

%e ..2....0....0....0....0....3....1....0....2....3....0....3....1....0....0....1

%K nonn

%O 1,2

%A _R. H. Hardin_ Jul 15 2011