login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A125336
Number of base 26 circular n-digit numbers with adjacent digits differing by 3 or less.
0
1, 26, 170, 878, 5314, 32546, 204290, 1299114, 8349954, 54102794, 352836290, 2313260426, 15233145250, 100686576250, 667632373298, 4439154062018, 29587484525314, 197622056861834, 1322444776094468, 8864330906128944
OFFSET
0,2
COMMENTS
[Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.int(n/2)+1
PROG
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
CROSSREFS
Sequence in context: A037052 A156339 A268331 * A321113 A126494 A374489
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved