|
| |
|
|
A125454
|
|
Number of base 19 circular n-digit numbers with adjacent digits differing by 8 or less.
|
|
0
| |
|
|
1, 19, 251, 2899, 38027, 509239, 6922823, 94744711, 1301066891, 17895943729, 246351600811, 3392528778229, 46727519959343, 643666830505159, 8866832290305149, 122147626590349999, 1682697341501872923
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+F(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))
|
|
|
CROSSREFS
| Sequence in context: A017998 A018912 A021202 * A009762 A017952 A055433
Adjacent sequences: A125451 A125452 A125453 * A125455 A125456 A125457
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006
|
| |
|
|
