A125356 Number of base 19 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 19, 151, 979, 7391, 56769, 446635, 3562417, 28719839, 233396143, 1908631671, 15685438183, 129415466639, 1071158916743, 8888586709041, 73910874048609, 615613183193519, 5134422106241421, 42869268105031999, 358244686255795945

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..19.

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: A157682 A153692 A142060 * A293116 A066668 A111884

Adjacent sequences: A125353 A125354 A125355 * A125357 A125358 A125359

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved