|
Search: id:A125389
|
|
|
| A125389 |
|
Number of base 26 circular n-digit numbers with adjacent digits differing by 5 or less. |
|
+0
1
|
|
| 1, 26, 256, 2036, 18916, 178776, 1730542, 16983454, 168485308, 1685157860, 16963782666, 171654215594, 1744297209730, 17786783187134, 181898203342216, 1864685423926896, 19153948120401164, 197081201888778900
(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: A060105 A108645 A086023 this_sequence A109467 A126547 A136922
Adjacent sequences: A125386 A125387 A125388 this_sequence A125390 A125391 A125392
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
