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A124858 Number of base 12 circular n-digit numbers with adjacent digits differing by 2 or less. 1
1, 12, 54, 198, 842, 3622, 15984, 71468, 323042, 1472022, 6751064, 31123148, 144092684, 669468708, 3119587196, 14572658668, 68216250402, 319893194558, 1502357897232, 7064711394284, 33257109397452, 156701323391972 (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: A019582 A025204 A005549 * A183713 A126399 A137938

Adjacent sequences:  A124855 A124856 A124857 * A124859 A124860 A124861

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified June 6 18:59 EDT 2020. Contains 334832 sequences. (Running on oeis4.)