|
| |
|
|
A125370
|
|
Number of base 7 circular n-digit numbers with adjacent digits differing by 5 or less.
|
|
0
| |
|
|
1, 7, 47, 307, 2067, 13927, 93887, 632947, 4267107, 28767367, 193939727, 1307475187, 8814549747, 59424674407, 400620795167, 2700848143027, 18208192833987, 122753397719047, 827561350484207, 5579135091500467
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
|
|
|
PROG
| (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
|
|
|
CROSSREFS
| Sequence in context: A198845 A126635 A085352 * A163346 A186446 A126528
Adjacent sequences: A125367 A125368 A125369 * A125371 A125372 A125373
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006
|
| |
|
|
