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A125322
Number of base 12 circular n-digit numbers with adjacent digits differing by 3 or less.
0
1, 12, 72, 360, 2080, 12232, 73656, 449440, 2770016, 17195112, 107304872, 672224048, 4223186080, 26586825472, 167628931360, 1058056409920, 6683674433920, 42244783230496, 267124015799712, 1689602502335776
OFFSET
0,2
COMMENTS
[Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.int(n/2)+1
PROG
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
CROSSREFS
Sequence in context: A036392 A035472 A036398 * A126480 A030235 A088166
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved