

A125439


Number of base 27 circular ndigit numbers with adjacent digits differing by 7 or less.


0



1, 27, 349, 3723, 46157, 583687, 7554133, 99104599, 1313531925, 17539619163, 235514695099, 3175602492309, 42952775347889, 582333628754047, 7908808568321989, 107551307959489303, 1463999937423331797
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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



