cp's OEIS Frontend

A204212 Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than 7.

%I A204212 #7 Jun 02 2025 07:37:52
%S A204212 1,8,64,652,7120,82440,991152,12262470,155072356,1995610260,
%T A204212 26048900628,344054761656,4589736845308,61750810543324,
%U A204212 836935922008844,11416462124627925,156613134014878257,2159264087976308543
%N A204212 Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than 7.
%C A204212 Column 7 of A204213
%H A204212 R. H. Hardin, <a href="/A204212/b204212.txt">Table of n, a(n) for n = 1..210</a>
%e A204212 Some solutions for n=5
%e A204212 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e A204212 ..4....2....7....4....7....6....4....6....4....4....2....4....6....3....1....4
%e A204212 ..6....0....9....7....9....6....0....4....3....4....6....5....6....9....6...10
%e A204212 ..6....2...14....7...12....8....7....2....4....8....2....8....4....5....2...12
%e A204212 ..5....7....7....7....6....1....2....7....4....6....4....5....4....2....5....5
%e A204212 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%K A204212 nonn
%O A204212 1,2
%A A204212 _R. H. Hardin_ Jan 12 2012