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A124935 Number of base 18 circular n-digit numbers with adjacent digits differing by 2 or less. 0
1, 18, 84, 312, 1352, 5908, 26490, 120278, 552032, 2553972, 11892734, 55672118, 261759734, 1235323302, 5848421012, 27764530552, 132124679472, 630077734772, 3010344270942, 14406602755262, 69048608938842, 331383832210022 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+A005191(n+1) for base>=2.int(n/2)+1

LINKS

Table of n, a(n) for n=0..21.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>2)+($[(i+1)mod N]`-$[i]`>2))

CROSSREFS

Sequence in context: A039358 A043961 A067984 * A126405 A250101 A141842

Adjacent sequences:  A124932 A124933 A124934 * A124936 A124937 A124938

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified November 22 10:16 EST 2014. Contains 249805 sequences.