|
Search: id:A125423
|
|
|
| A125423 |
|
Number of base 11 circular n-digit numbers with adjacent digits differing by 7 or less. |
|
+0
1
|
|
| 1, 11, 109, 1019, 10157, 101661, 1019443, 10225933, 102583621, 1029106379, 10323909799, 103568694097, 1038993624419, 10423109098179, 104563879665711, 1048977311016399, 10523264850876341, 105568635251351455
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+F(7) for base>=7.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
|
|
PROGRAM
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
|
|
CROSSREFS
|
Sequence in context: A071380 A142423 A159495 this_sequence A165149 A048346 A054320
Adjacent sequences: A125420 A125421 A125422 this_sequence A125424 A125425 A125426
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
