|
|
A126499
|
|
Number of base 31 n-digit numbers with adjacent digits differing by three or less.
|
|
3
|
|
|
1, 31, 205, 1379, 9333, 63399, 431717, 2944947, 20115561, 137543107, 941258689, 6445801999, 44166431335, 302771722951, 2076414065529, 14244985903467, 97754711626643, 671000257052461, 4606822746884183, 31634499742407797
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
[Empirical] a(base,n)=a(base-1,n)+7^(n-1) for base>=3n-2; a(base,n)=a(base-1,n)+7^(n-1)-2 when base=3n-3
|
|
LINKS
|
|
|
PROG
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>3)+($[i+1]`-$[i]`>3))
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|