|
|
A125471
|
|
Number of base 14 circular n-digit numbers with adjacent digits differing by 9 or less.
|
|
0
|
|
|
1, 14, 176, 2084, 26356, 334784, 4260722, 54242594, 690612444, 8792978324, 111953947446, 1425421218026, 18148766726542, 231073976662790, 2942083286880480, 37459233674496464, 476938975353648908
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.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]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|