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A125484 Number of base 27 circular n-digit numbers with adjacent digits differing by 9 or less. 0
1, 27, 423, 5607, 85683, 1337727, 21331503, 344238579, 5599424547, 91540779903, 1501346684863, 24673460611915, 406009294231251, 6686397678162879, 110171301582051951, 1815861973753907787, 29935310771775478339 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n

LINKS

Table of n, a(n) for n=0..16.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))

CROSSREFS

Sequence in context: A022655 A155988 A096950 * A022751 A004326 A233022

Adjacent sequences:  A125481 A125482 A125483 * A125485 A125486 A125487

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified September 24 21:29 EDT 2017. Contains 292441 sequences.