A124893 - OEIS

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A124893

Number of base 15 circular n-digit numbers with adjacent digits differing by 2 or less.

1, 15, 69, 255, 1097, 4765, 21237, 95873, 437537, 2012997, 9321899, 43397633, 202926209, 952396005, 4484003747, 21168581905, 100170213121, 474981809053, 2256307682541, 10735210220803, 51148724456627, 244007372314919 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`[Empirical] a(base,n)=a(base-1,n)+A005191(n+1) for base>=2.int(n/2)+1`
	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: A015876 A201126 A085474 * A126402 A053134 A000475` `Adjacent sequences: A124890 A124891 A124892 * A124894 A124895 A124896`
	KEYWORD	`nonn,base`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006`

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Last modified February 16 15:50 EST 2012. Contains 205931 sequences.