A124828 - OEIS

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A124828

Number of base 7 circular n-digit numbers with adjacent digits differing by 2 or less.

1, 7, 29, 103, 417, 1717, 7229, 30793, 132225, 570649, 2470769, 10719793, 46569777, 202477633, 880792193, 3832748833, 16681516545, 72613292353, 316105114817, 1376159456641, 5991281182977, 26084303730049 (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: A193655 A102485 A049349 * A037094 A118171 A072261` `Adjacent sequences: A124825 A124826 A124827 * A124829 A124830 A124831`
	KEYWORD	`nonn,base`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006`

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Last modified February 17 09:12 EST 2012. Contains 206006 sequences.