|
Search: id:A124706
|
|
|
| A124706 |
|
Number of base 13 circular n-digit numbers with adjacent digits differing by 1 or less. |
|
+0
1
|
|
| 1, 13, 37, 85, 225, 593, 1609, 4409, 12217, 34105, 95817, 270569, 767325, 2184013, 6235693, 17852045, 51229417, 147318953, 424429081, 1224825209, 3539918965, 10244733605, 29685367573, 86113604309, 250061941093, 726831403493
(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
|
Adjacent sequences: A124703 A124704 A124705 this_sequence A124707 A124708 A124709
Sequence in context: A089114 A039367 A139697 this_sequence A089528 A043190 A043970
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
