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 A125539 Number of n X n arrays with entries in 1..8 in which adjacent entries differ by 5 or less (adjacent means in x or y directions). 0
 1, 8, 2902, 52127130, 45120225704486, 1888405717902201691046, 3819825084723229625771326323002, 373453238394596300163358238712837771590526 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS [Empirical] a(base+1,n,diff)=a(base,n,diff)+F(n,diff) for base>=2.diff.(n-1) and F(n,diff)= (n=2, A063496(diff+1)) (n=3, A068744(diff+1)) (n=4, A068745(diff+1)) (n=5, A068746(diff+1)) (n=6, A068747(diff+1)) LINKS PROG (S/R) stvar \$[N][N]:(0.. M-1) init \$[][]:=0 asgn \$[][]->{*} kill +[i in 0.. N-2](+[j in 0.. N-1]((\$[i][j]`-\$[i+1][j]`>5)+(\$[i+1][j]`-\$[i][j]`>5)+(\$[j][i]`-\$[j][i+1]`>5)+(\$[j][i+1]`-\$[j][i]`>5))) CROSSREFS Sequence in context: A185901 A078525 A280282 * A297922 A298546 A298336 Adjacent sequences:  A125536 A125537 A125538 * A125540 A125541 A125542 KEYWORD nonn AUTHOR R. H. Hardin, Dec 31 2006 STATUS approved

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Last modified September 27 10:35 EDT 2020. Contains 337380 sequences. (Running on oeis4.)