A125364 - OEIS

A125364

Number of base 27 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 27, 223, 1467, 11303, 88377, 707923, 5747433, 47168039, 390278007, 3250471333, 27216501185, 228895105331, 1932205156259, 16362201900939, 138934036864707, 1182486246555079, 10084940483186669, 86164966628165665

(list; graph; refs; listen; history; text; internal format)

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: A107054 A160441 A222994 * A126522 A273822 A027500

Adjacent sequences: A125361 A125362 A125363 * A125365 A125366 A125367

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved