|
Search: id:A125391
|
|
|
| A125391 |
|
Number of base 28 circular n-digit numbers with adjacent digits differing by 5 or less. |
|
+0
1
|
|
| 1, 28, 278, 2218, 20698, 196378, 1908368, 18800964, 187240242, 1880087458, 19001528288, 193056703076, 1969968657844, 20174161922072, 207225426515028, 2134025764850968, 22024156859681682, 227721370771551778
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
|
|
PROGRAM
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
|
|
CROSSREFS
|
Sequence in context: A093196 A065693 A159883 this_sequence A126549 A107418 A027781
Adjacent sequences: A125388 A125389 A125390 this_sequence A125392 A125393 A125394
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
