

A125424


Number of base 12 circular ndigit numbers with adjacent digits differing by 7 or less.


0



1, 12, 124, 1188, 12356, 129492, 1361746, 14331126, 150856188, 1588078260, 16718137334, 175997231290, 1852781990558, 19504865161846, 205334357806520, 2161624764528348, 22756160755947020, 239561861905201388
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OFFSET

0,2


COMMENTS

[Empirical] a(base,n)=a(base1,n)+F(7) for base>=7.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n


LINKS



PROG

(S/R) stvar $[N]:(0..M1) init $[]:=0 asgn $[]>{*} kill +[i in 0..N1](($[i]`$[(i+1)mod N]`>7)+($[(i+1)mod N]`$[i]`>7))


CROSSREFS



KEYWORD

nonn,base


AUTHOR



STATUS

approved



