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 A125368 Number of base 31 circular n-digit numbers with adjacent digits differing by 4 or less. 0
 1, 31, 259, 1711, 13259, 104181, 838567, 6839941, 56392139, 468718939, 3921391169, 32982034061, 278635097351, 2362736395895, 20099255075641, 171451320170481, 1466033625495387, 12562096168712455, 107842286116562887 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1 LINKS Table of n, a(n) for n=0..18. PROG (S/R) stvar \$[N]:(0..M-1) init \$[]:=0 asgn \$[]->{*} kill +[i in 0..N-1]((\$[i]`-\$[(i+1)mod N]`>4)+(\$[(i+1)mod N]`-\$[i]`>4)) CROSSREFS Sequence in context: A142623 A089705 A180471 * A126526 A008386 A161558 Adjacent sequences: A125365 A125366 A125367 * A125369 A125370 A125371 KEYWORD nonn,base AUTHOR R. H. Hardin, Dec 28 2006 STATUS approved

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Last modified December 9 12:57 EST 2023. Contains 367690 sequences. (Running on oeis4.)