|
Search: id:A125476
|
|
|
| A125476 |
|
Number of base 19 circular n-digit numbers with adjacent digits differing by 9 or less. |
|
+0
1
|
|
| 1, 19, 271, 3439, 49051, 712519, 10458163, 154101799, 2274460507, 33592425049, 496277475271, 7332583525319, 108345196911631, 1600923503226079, 23655650115244789, 349542980141854759, 5164958667871471243
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.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]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))
|
|
CROSSREFS
|
Sequence in context: A083004 A139739 A016189 this_sequence A016248 A016187 A016184
Adjacent sequences: A125473 A125474 A125475 this_sequence A125477 A125478 A125479
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
