|
|
A125376
|
|
Number of base 13 circular n-digit numbers with adjacent digits differing by 5 or less.
|
|
0
|
|
|
1, 13, 113, 853, 7333, 64363, 574739, 5174497, 46797333, 424220677, 3850319843, 34968769519, 317694077779, 2886778840153, 26233562935679, 238408390689523, 2166688400848533, 19691415248239135, 178961780093458481
(list;
graph;
refs;
listen;
history;
text;
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.
|
|
LINKS
|
|
|
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
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|