A125363 - OEIS

A125363

Number of base 26 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 26, 214, 1406, 10814, 84426, 675262, 5474306, 44862014, 370667774, 3082741374, 25775117966, 216460107326, 1824572346350, 15427938607960, 130804716210096, 1111599418378734, 9465652381274166, 80745664149260704

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OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1

LINKS

Table of n, a(n) for n=0..18.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))

CROSSREFS

Sequence in context: A100242 A042310 A213123 * A126521 A242262 A241938

Adjacent sequences: A125360 A125361 A125362 * A125364 A125365 A125366

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved