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A125391
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Number of base 28 circular n-digit numbers with adjacent digits differing by 5 or less.
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0
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1, 28, 278, 2218, 20698, 196378, 1908368, 18800964, 187240242, 1880087458, 19001528288, 193056703076, 1969968657844, 20174161922072, 207225426515028, 2134025764850968, 22024156859681682, 227721370771551778
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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PROG
| (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
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CROSSREFS
| Sequence in context: A179098 A065693 A159883 * A126549 A107418 A183484
Adjacent sequences: A125388 A125389 A125390 * A125392 A125393 A125394
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KEYWORD
| nonn,base
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006
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