|
Search: id:A124719
|
|
|
| A124719 |
|
Number of base 26 circular n-digit numbers with adjacent digits differing by 1 or less. |
|
+0
1
|
|
| 1, 26, 76, 176, 472, 1256, 3442, 9518, 26608, 74912, 212206, 604058, 1726582, 4952246, 14246644, 41090936, 118785568, 344073056, 998415598, 2901784298, 8445850762, 24614293082, 71820129424, 209785569908, 613390314046
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+A002426(n+1) for base>=1.int(n/2)+1
|
|
PROGRAM
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>1)+($[(i+1)mod N]`-$[i]`>1))
|
|
CROSSREFS
|
Sequence in context: A044164 A044545 A139698 this_sequence A126380 A083578 A042326
Adjacent sequences: A124716 A124717 A124718 this_sequence A124720 A124721 A124722
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
