login
A125365
Number of base 28 circular n-digit numbers with adjacent digits differing by 4 or less.
0
1, 28, 232, 1528, 11792, 92328, 740584, 6020560, 49474064, 409888240, 3418201292, 28657884404, 241330103336, 2039837966168, 17296465194604, 147063357683748, 1253373089577936, 10704229282080880, 91584291381177844
OFFSET
0,2
COMMENTS
[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
PROG
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
CROSSREFS
Sequence in context: A339137 A135180 A042524 * A126523 A115224 A135497
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved