|
Search: id:A126404
|
|
|
| A126404 |
|
Number of base 17 n-digit numbers with adjacent digits differing by two or less. |
|
+0
4
|
|
| 1, 17, 79, 375, 1793, 8611, 41473, 200149, 967355, 4680655, 22667487, 109848049, 532610303, 2583482303, 12535495657, 60839746967, 295338090269, 1433900817213, 6962605102325, 33811619587041, 164207415391765
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+5^(n-1) for base>=2n-1; a(base,n)=a(base-1,n)+5^(n-1)-2 when base=2n-2
|
|
PROGRAM
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>2)+($[i+1]`-$[i]`>2))
|
|
CROSSREFS
|
Cf. Base 17 differing by one or less A126371.
Sequence in context: A146594 A124898 A036429 this_sequence A142021 A060934 A100688
Adjacent sequences: A126401 A126402 A126403 this_sequence A126405 A126406 A126407
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
