|
Search: id:A125440
|
|
|
| A125440 |
|
Number of base 28 circular n-digit numbers with adjacent digits differing by 7 or less. |
|
+0
1
|
|
| 1, 28, 364, 3892, 48412, 614068, 7972636, 104937364, 1395605212, 18702818716, 252094162664, 3412942474992, 46361084525644, 631380551380516, 8615433816724714, 117735819504461662, 1610758432389050988
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+F(7) for base>=7.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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
|
|
CROSSREFS
|
Sequence in context: A022720 A085744 A138452 this_sequence A122732 A010944 A022623
Adjacent sequences: A125437 A125438 A125439 this_sequence A125441 A125442 A125443
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
