|
Search: id:A126546
|
|
|
| A126546 |
|
Number of base 25 n-digit numbers with adjacent digits differing by five or less. |
|
+0
1
|
|
| 1, 25, 245, 2475, 25255, 259127, 2667039, 27499769, 283843569, 2931488329, 30286288971, 312960372023, 3234309867213, 33427353913483, 345492390255623, 3570953641573985, 36909251330677927, 381495392831876277
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
[Empirical] a(base,n)=a(base-1,n)+11^(n-1) for base>=5n-4; a(base,n)=a(base-1,n)+11^(n-1)-2 when base=5n-5
|
|
PROGRAM
|
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>5)+($[i+1]`-$[i]`>5))
|
|
CROSSREFS
|
Cf. Base 25 differing by four or less A126520, three or less A126493, two or less A126412, one or less A126379.
Sequence in context: A108178 A107943 A125388 this_sequence A023073 A022685 A042208
Adjacent sequences: A126543 A126544 A126545 this_sequence A126547 A126548 A126549
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
|
|
|
Search completed in 0.002 seconds
|
