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

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